When The Mermaids Cry: The Great Plastic TidePosted in Coastal Care.org by Claire Le Guern Lytle
The world population is living, working, vacationing, increasingly conglomerating along the coasts, and standing on the front row of the greatest, most unprecedented, plastic waste tide ever faced.
Washed out on our coasts in obvious and clearly visible form, the plastic pollution spectacle blatantly unveiling on our beaches is only the prelude of the greater story that unfolded further away in the world’s oceans, yet mostly originating from where we stand: the land.
In 2008, our global plastic consumption worldwide has been estimated at 260 million tons. Plastic is versatile, lightweight, flexible, moisture resistant, strong, and relatively inexpensive. Those are the attractive qualities that lead us, around the world, to such a voracious appetite and over-consumption of plastic goods. However, durable and very slow to degrade, plastic materials that are used in the production of so many products all, ultimately, become waste with staying power. Our tremendous attraction to plastic, coupled with an undeniable behavioral propensity of increasingly over-consuming, discarding, littering and thus polluting, has become a combination of lethal nature.
African coast marine debris. Photo: Candace Feit
Lying halfway between Asia and North America, north of the Hawaiian archipelago, and surrounded by water for thousands of miles on all sides, the Midway Atoll is about as remote as a place can get. However, Midways’ isolation has not spared it from the great plastic tide either, receiving massive quantities of plastic debris, shot out from the North Pacific circular motion of currents (gyre). Midways’ beaches, covered with large debris and millions of plastic particles in place of the sand, are suffocating, envenomed by the slow plastic poison continuously washing ashore.
Then, on shore, the spectacle becomes even more poignant, as thousands of bird corpses rest on these beaches, piles of colorful plastic remaining where there stomachs had been. In some cases, the skeleton had entirely biodegraded; yet the stomach-size plastic piles are still present, intact.
Witnesses have watched in horror seabirds choosing plastic pieces, red, pink, brown and blue, because of their similarity to their own food. It is estimated that of the 1.5 million Laysan Albatrosses which inhabit Midway, all of them have plastic in their digestive system; for one third of the chicks, the plastic blockage is deadly, coining Midway Atoll as “albatross graveyards” by five media artists, led by photographer Chris Jordan, who recently filmed and photographed the catastrophic effects of the plastic pollution there.
Albatross, victim of plastic ingestion. Photo: Unknown.
The United Nations Joint Group of Experts on the Scientific Aspects of Marine Pollution (GESAMP), estimated that land-based sources account for up to 80 percent of the world’s marine pollution, 60 to 95 percent of the waste being plastics debris.
However, most of the littered plastic waste worldwide ultimately ends up at sea. Swirled by currents, plastic litter accumulates over time at the center of major ocean vortices forming “garbage patches”, i.e. larges masses of ever-accumulating floating debris fields across the seas. The most well known of these “garbage patches” is the Great North Pacific Garbage Patch, discovered and brought to media and public attention in 1997 by Captain Charles Moore. Yet some others large garbage patches are highly expected to be discovered elsewhere, as we’ll see further.
The plastic waste tide we are faced with is not only obvious for us to clearly see washed up on shore or bobbing at sea. Most disconcertingly, the overwhelming amount and mass of marine plastic debris is beyond visual, made of microscopic range fragmented plastic debris that cannot be just scooped out of the ocean.
Slow, silent, omnipresent, ever increasing, more toxic than previously thought, the plastic pollution’s reality bears sobering consequences, as recently unveiled by the report of Japanese chemist Katsuhiko Saido at the 238th National Meeting of the American Chemical Society (ACS) in August 2009 and the findings from the Project Kaisei and Scripps (Seaplex) scientific cruise-expeditions collecting seawater samples from the Great Garbage Patch. Both, the reports and expeditions uncovered new evidence of how vast and “surprisingly” (as it was termed at the ACS meeting) toxic the plastic presence in the marine environment is.
Photo: Kuta Beach, Bali by Claude Graves
They reported that small plastic pellets called “mermaids tears”, which are the result of industry and domestic plastic waste, have indeed spread across the world’s seas. Some plastic pellets had fragmented to particles thinner than the diameter of a human hair. But while some cannot be seen, those pieces are still there and are still plastic. They are not absorbed into the natural system, they just float around within it, and ultimately are ingested by marine animals and zooplankton (Plankton that consists of tiny animals, such as rotifers, copepods, and krill, larger animals eggs and larvae’s and of microorganisms once classified as animals, such as dinoflagellates and other protozoans.).
This plastic micro-pollution, with its inherent toxicity and consequences on the food chain, had yet to be studied…
Dr Saido’s study was the first one to look at what actually happens over the years to these tons of plastic waste floating in the world’s oceans. The study presents an alarming fact: these tons of plastic waste reputed to be virtually indestructible, do decompose with surprising speed, at much lower temperature than previously thought possible, and release toxic substances into the seawater, namely bisphenol A (BPA) and PS oligomer. These chemicals are considered toxic and can be metabolized subsequent to ingestion, leading Dr Saido to state “…plastics in the ocean will certainly give rise to new sources of global contaminations that will persist long into the future”.
This past August a different study, from a group of oceanography students from Scripps Institution of Oceanography (SIO), UCSD, accompanied by the international organization Project Kaisei’s team, embarked on two vessels, New Horizon and Kaisei, through the North Pacific Ocean to sample plastic debris and garbage. SIO director Tony Haymet described the trip as “ …a forage into the great plastic garbage patch in the north.” To summarize the scientific data collected on the ship, Miriam Goldstein, chief scientist on New Horizon, stated: “We did find debris… coming up in our nets in over 100 consecutive net tows over a distance of 1,700 miles… It is pretty shocking.”
She said, “[There is] not a big island, not a garbage dump [that we] can really see easily.” She described it more as a place where large debris floats by a ship only occasionally, but a lot of tiny pieces of plastic exist below the surface of the water. “Ocean pretty much looks like ocean,” she said. “The plastic fragments are mostly less than a quarter inch long and are below the surface. It took at first a magnifying-glass to see the true extent of plastic damage in the North Pacific.”
The overwhelmingly largest unquantifiable plastic mass is just made of confetti-like fragmented pieces of plastic.
In a press conference in September 2009, the director of the California Department of Toxic Substances Control (DTSC), Maziar Movassaghi, referring to Project Kaisei’s findings, held a small glass bottle filled with seawater sampled at the Great North Garbage Patch. Inside was murky seawater with hundreds of fragmented plastics pieces: “That is what we have to stop”.
All sea creatures, from the largest to the microscopic organisms, are, at one point or another, swallowing the seawater soup instilled with toxic chemicals from plastic decomposition. The world population “… (is) eating fish that have eaten other fish, which have eaten toxin-saturated plastics. In essence, humans are eating their own waste.” (Dixit Renee Brown, WiredPress).
Photo: Manan Vastsyayana
The “Silent World” is shedding mermaid tears. A plastic-poison has undeniably been instilled by us, prompting an unwilling and illegitimate confrontation of two titans: one synthetic (plastic), the other oceanic. The crisis is of massive proportion. An unprecedented plastic tide has occurred, pervasively affecting the world’s oceans, beaches, coasts, seafloor, animals and ultimately, us.
I: The Great Plastic Tide: Magnitude, Scope, ExtentA full understanding of the magnitude and scope of this plastic pollution starts with clear definitions as to what and why it is happening. Thus, we will define the notions of marine debris, gyres, and oceanic garbage patches, or giant floating marine debris field, as first discovered in the North Pacific by Captain Charles Moore’s, since referred to as The Great Pacific Garbage Patch (GGP).
Marine Debris and Plastic
Krichim, Boat in plastic, April 25, 2009. Photo: Dimitar Dilkoff
Marine DebrisThe term marine debris has been used for at least 25 years to refer to man-made materials that have been discarded or lost into the ocean. The earliest references come from the 1984 Workshop on the Impacts and Fate of Marine Debris (Shomura and Yoshida 1985). This workshop came out of a 1982 request from the Marine Mammal Commission to the National Marine Fisheries Service to examine the impacts of marine debris. At that time, the focus of research was primarily on derelict fishing gear. Keep in mind that this was prior to the implementation of both the high-seas driftnet ban and MARPOL Annex V.
Other terms used prior to 1984 include the following: man-made debris (Feder et all 1978), synthetic debris (Balazs 1979), plastic litter (Merrell 1980), floating plastic debris (Morris 1980), man-made objects (Shaughnessy 1980, Venrick et al 1973), and debris (Scordino and Fisher 1983).
It would appear that the term debris was being used in these articles by academics as something discarded: litter.
Photo: ©© Jan Vozenilek-05-0924 / The Midway JourneyThe term marine debris encompasses more than plastic, including metals (derelict vessels, dumped vehicles, beverage containers), glass (light bulbs, beverage containers, older fishing floats), and other materials (rubber, textiles, lumber). Plastic certainly makes up the majority of floating litter, but in some areas the debris on the ocean floor may contain sizeable amounts of those other denser types.
Scientists have similarly and more simply defined marine debris as, any manufactured or processed solid waste material that enters the ocean environment from any source (Coe & Rogers, 1997). Marine debris is definitely characterized as human-created waste that has deliberately or accidentally become afloat. They tend to accumulate at the centre of gyres and on coastlines, frequently washing aground where it is known as beach litter.
The US Congress passed a bill in 2006, The Marine Debris Research, Prevention, and Reduction Act, to create a program to address the marine debris pollution. One of the requirements in the bill was for NOAA (National Oceanic and Atmospheric Administration) and the U.S. Coast Guard, to promulgate a definition of marine debris for the purposes of the Act. Thus, USCG and NOAA drafted and published a definition of marine debris in September 2009.
The definition is this: “Any persistent solid material that is manufactured or processed and directly or indirectly, intentionally or unintentionally, disposed of or abandoned into the marine environment or the Great Lakes.” Marine debris can come in many forms, from a plastic soda bottle to a derelict vessel. Types and components of marine debris include plastics, glass, metal, Styrofoam, rubber, derelict fishing gear, and derelict vessels.
UNEP has defined marine debris, or marine litter, as “any persistent, manufactured, processed, or solid material discarded, disposed of, or abandoned in the marine and coastal environment.” This is an even more global and comprehensive definition, as it does include the marine and correlated coastal impact of the aforementioned litter.
Photo: ©© Jan Vozenilek-03-0771 / The Midway JourneyAs we mentioned supra, land-based sources of debris account for up to 80 percent of the world’s marine pollution. Such debris is unquestionably one of the world’s most pervasive pollution problems affecting our beaches, coasts, oceans, seafloors, inland waterways and lands. It affects the economies and inhabitants of coastal and waterside communities worldwide.
The effect of coastal littering is obviously compounded by vectors, such as rivers and storm drains, discharging litter from inland urban areas. Obviously, ocean current patterns, climate and tides, and proximity to urban centers, industrial and recreational areas, shipping lanes, and commercial fishing grounds influence the types and amount of debris that is found in the open ocean or collected along beaches, coasts and waterways, above and below the water’s edge.
The other 20 percent of this debris is from dumping activities on the water, including vessels (from small power and sailboats to large transport ships carrying people and goods), offshore drilling rigs and platforms, and fishing piers.
Over the past 60 years, organic materials, once the most common form of debris, have yielded to synthetic elements as the most abundant material in solid waste. Marine litter is now 60 to 80 percent plastic, reaching 95 percent in some areas, according to a report by the Algalita Marine Research Foundation (created by Charles Moore), published in October 2008 in Environmental Research.
Citarum River, flowing to the Sea, is the main source of houselhold water for Jakarta.(14million people). Photo source: photobucket
Yearly data adds to the despondent reality of how extensively the plastic tide is increasingly affecting world’s beaches and coasts. Launched in 1986 by the Ocean Conservancy, the Center for Marine Conservation’s annual International Coastal Cleanup (ICC) has grown into the world’s largest volunteer effort to collect data on the marine environment.
Held the third Saturday of each September, the International Coastal Cleanup engages the public to remove trash and debris from the coasts, beaches, waterways, underwater, and on lands to identify the sources of debris. It is a compelling global snapshot of marine debris collected on one day at thousands of sites all over the world.
The 2008, 23rd ICC reported that 104 countries and locations, from Bahrain to Bangladesh, and in 42 US States, from southern California to the rocky coast of Maine, had participated. The overwhelming percentage of debris collected was plastics and smoking paraphernalia. The 2008 report states that plastic litter has increased by 126 percent since ICC first survey in 1994. The top 3 items found in 2008 were cigarettes butts, plastic bags, and food wrappers/containers.
Durable and slow to degrade, plastic materials that are used in the production of so many products, from containers for beverage bottles, packing straps and tarps, and synthetic nylon materials used in fishing line, all become debris with staying power. Plastics debris accumulates because it does not biodegrade as many other substances do; although it will photo degrade on exposure to sunlight and does decompose, more rapidly than previously thought. (We will explain these processes as we study the nature and properties of plastic itself infra.).
In addition, most of these plastic waste items are highly buoyant, allowing them to travel in currents for thousands of miles, endangering marine ecosystems and wildlife along the way. Marine debris is a global transboundary pollution problem.
Icelandic shore. The marine area around Iceland is considered as one of the cleanest of the world. Photo Source: Clean up the Coastline, Veraldarvinir
PlasticThe paucity of concerted and definitive scientific data/research in this matter is staggering compared to the extent of the problem.
Only in 1997, with Captain Charles Moore’s discovery, was the plastic waste pollution in the ocean widely brought to media light and finally began to receive more serious attention from the public and the scientific world, stepping the way to more exhaustive research about plastic and its consequences and effects when entering marine life.
Of the 260 million tons of plastic the world produces each year, about 10 percent ends up in the Ocean, according to a Greenpeace report (Plastic Debris in the World’s Oceans, 2006). Seventy percent of the mass eventually sinks, damaging life on the seabed. The rest floats in open seas, often ending up in gyres, circular motion of currents, forming conglomerations of swirling plastic trash called garbage patches, or ultimately ending up washed ashore on someone’s beach.
But the washed up or floating plastic pollution is a lot more than an eyesore or a choking/entanglement hazard for marine animals or birds. Once plastic debris enters the water, it becomes one of the most pervasive problems because of plastic’s inherent properties: buoyancy, durability (slow photo degradation), propensity to absorb waterborne pollutants, its ability to get fragmented in microscopic pieces, and more importantly, its proven possibility to decompose, leaching toxic Bisphenol A (BPA) and other toxins in the seawater.
“Plastics are a contaminant that goes beyond the visual”, says Bill Henry of the Long Marine Laboratory, UCSC.
Seal trapped in plastic pollution. Photo: ©© Tedxgp2
Facts About Plastic
What is plastic?A simple definition could be: any of a group of synthetic or natural organic materials that may be shaped when soft and then hardened, including many types of resins, resinoids, polymers, cellulose derivatives, casein materials, and proteins: used in place of other materials, as glass, wood, and metals, in construction and decoration, for making many articles, as coatings, and, drawn into filaments, for weaving. They are often known by trademark names, as Bakelite, Vinylite, or Lucite.
In chemistry, plastics are large molecules, called polymers, composed of repeated segments, called monomers, with carbon backbones. A polymer is simply a very large molecule made up of many smaller units joined together, generally end to end, to create a long chain. The smallest building block of a polymer is called a monomer. Polymers are divided into two distinct groups: thermoplastics (moldable) and thermosets (not). The word “plastics” generally applies to the synthetic products of chemistry.
Alexander Parkes created the first man-made plastic and publicly demonstrated it at the 1862 Great International Exhibition in London. The material, called parkesine, was an organic material derived from cellulose that, once heated, could be molded and retained its shape when cooled.
Many, but not all, plastic products have a number – the resin identification code – molded, formed or imprinted in or on the container, often on the bottom. This system of coding was developed in 1988 by the U.S.-based Society of the Plastics Industry to facilitate the recycling of post-consumer plastics. It is indeed, quite interesting to go through the fine lines.
- Polyethylene terephthalate (PET or PETE) – Used in soft drink, juice, water, beer, mouthwash, peanut butter, salad dressing, detergent, and cleaner containers. Leaches antimony trioxide and (2ethylhexyl) phthalate (DEHP).
- DEHP is an endocrine disruptor that mimics the female hormone estrogen. It has been strongly linked to asthma and allergies in children. It may cause certain types of cancer and it has been linked to negative effects on the liver, kidney, spleen, bone formation, and body weight. In Europe, DEHP has been banned since 1999 from use in plastic toys for children under the age of three.
- High-density polyethylene (HDPE) – Used in opaque milk, water, and juice containers, bleach, detergent and shampoo bottles, garbage bags, yogurt and margarine tubs, and cereal box liners. Considered a safer plastic. Research on risks associated with this type of plastic is ongoing.
- Polyvinyl chloride (V or Vinyl or PVC) – Used in
toys, clear food and non-food packaging (e.g., cling wrap), some squeeze
bottles, shampoo bottles, cooking oil and peanut butter jars, detergent
and window cleaner bottles, shower curtains, medical tubing, and
numerous construction products (e.g., pipes, siding). PVC has been
described as one of the most hazardous consumer products ever created.
Leaches di (2-ethylhexyl) phthalate (DEHP) or butyl benzyl phthalate
(BBzP), depending on which is used as the plasticizer or softener
(usually DEHP). DEHP and BBzP are endocrine disruptors mimicking the
female hormone estrogen; have been strongly linked to asthma and
allergic symptoms in children; may cause certain types of cancer; and
linked to negative effects on the liver, kidney, spleen, bone formation,
and body weight. In Europe, DEHP, BBzP, and other dangerous phthalates
have been banned from use in plastic toys for children under three since
1999. Not so elsewhere, including Canada and the United States.
Dioxins are unintentionally, but unavoidably, produced during the manufacture of materials containing chlorine, including PVC and other chlorinated plastic feedstocks. Dioxin is a known human carcinogen and the most potent synthetic carcinogen ever tested in laboratory animals. A characterization by the National Institute of Standards and Technology of cancer causing potential evaluated dioxin as over 10,000 times more potent than the next highest chemical (diethanol amine), half a million times more than arsenic, and a million or more times greater than all others.
- Low-density polyethylene (LDPE) – Used in grocery store, dry cleaning, bread and frozen food bags, most plastic wraps, and squeezable bottles (honey, mustard). Considered a safer plastic. Research on risks associated with this type of plastic is ongoing.
- Polypropylene (PP) – Used in ketchup bottles, yogurt and margarine tubs, medicine and syrup bottles, straws, and Rubbermaid and other opaque plastic containers, including baby bottles. Considered a safer plastic. Research on risks associated with this type of plastic is ongoing.
- Polystyrene (PS) – Used in Styrofoam containers, egg cartons, disposable cups and bowls, take-out food containers, plastic cutlery, and compact disc cases. Leaches styrene, an endocrine disruptor mimicking the female hormone estrogen, and thus has the potential to cause reproductive and developmental problems. Long-term exposure by workers has shown brain and nervous system effects and adverse effects on red blood cells, liver, kidneys, and stomach in animal studies. Also present in secondhand cigarette smoke, off gassing of building materials, car exhaust, and possibly drinking water. Styrene migrates significantly from polystyrene containers into the container’s contents when oily foods are heated in such containers.
- Other – This is a catchall category that includes anything that does not come within the other six categories. As such, one must be careful in interpreting this category because it includes polycarbonate – a dangerous plastic – but it also includes the new, safer, biodegradable bio-based plastics made from renewable resources such as corn and potato starch and sugar cane. Polycarbonate is used in many plastic baby bottles, clear plastic sippy cups, sports water bottles, three and five gallon large water storage containers, metal food can liners, some juice and ketchup containers, compact discs, cell phones, computers. Polycarbonate leaches Bisphenol A (some effects described above) and numerous studies have indicated a wide array of possible adverse effects from low-level exposure to Bisphenol A: chromosome damage in female ovaries, decreased sperm production in males, early onset of puberty, various behavioral changes, altered immune function, and sex reversal in frogs.
Plastic debris, of all sizes and shapes, is a transboundary pollution problem with a powerful vehicle, the ocean.
Vacha Dam near town of Krichim, April 25, 2009. Photo: Dimitar Dilkoff
BuoyancyPlastics travel long distances. Their distribution in the oceans isn’t uniform, yet they are omnipresent from the Polar Regions to the Equator. Scientists are still refining methods to detect and analyze the materials. A good example of plastic debris’ buoyancy is as follows. In 1992, twenty containers full of rubber ducks were lost overboard from a ship traveling from China to Seattle. By 1994, some had been tracked to Alaska, while others reached Iceland in 2000. The ducks (with a distinctive logo on their base) have been sighted in the Arctic, Pacific and Atlantic Oceans (Ebbesmeyer, 2003).
Photodegradation Vs. BiodegradationPlastic is generally a durable material. Its durability has made the culprit of the problem since it is considered resistant to natural biodegradation processes, i.e. the microbes that break down other substances do not recognize plastic as food. Yet plastic can be fragmented with the effects of UV, being broken down by light in smaller and smaller debris over time.
Biodegradation, the breaking down of organic substances by natural means, happens all the time in nature. All plant-based, animal-based, or natural mineral-based substances will over time biodegrade. In its natural state raw crude oil will biodegrade, but man-made petrochemical compounds made from oil, such as plastic, will not. Why not? Because plastic is a combination of elements extracted from crude oil then re-mixed up by men in white coats. Because these combinations are man made they are unknown to nature. Consequently, it has been thought that there is no natural system to break them down. The enzymes and the micro organisms responsible for breaking down organic materials that occur naturally such as plants, dead animals, rocks and minerals, don’t recognize them. This means that plastic products are said indestructible, in a biodegradable sense at least.
Indian Beach, Manori. Photo Source: Malad Bolivari.
Of particular concern are the floating small plastic fragments often referred in the media to as mermaids’ tears, which are tiny nurdles of raw plastic resin that form the building material of every manufactured plastic product, or are granules of domestic waste that have fragmented over the years. Dr Richard Thompson of the University of Plymouth, UK has identified plastic particles thinner than the diameter of a human hair. But while they cannot be seen, those pieces are still there and are still plastic. Not absorbed into the natural system, they just float around within it. He estimates that there are 100,000 particles of plastic per sq km of seabed and 300,000 items of plastic per sq km of sea surface.
Either way, mermaid tears, or fragmented plastic debris, reaching microscopic size over time, remain everywhere and are almost impossible to clean up. They are light enough to float in the wind, landing in the earth’s oceans. Mermaid’s tears are often found in filter feeders like mussels, barnacle, lugworm and amphipods.
Thus, the photo degradation of plastic debris makes the matter worse. Plastic becomes microscopic, invisible, yet ever polluting waters, beaches, coasts, seafloor, being eaten by even tinier marine organisms, therefore entering the food chain insidiously and ineluctably.
Toxic SpongeCorroborating reports and findings worldwide demonstrated that fragmented plastics debris’ increase and massive presence on and off shores does constitute reason for raised worries and awareness.
Studies on small plastic pellet by Dr Richard Thompson and by Hideshige Takada, Yukie Mato professor of organic geochemistry at Tokyo University, have shown that plastic debris meeting other pollutants in the oceans absorbs harmful chemicals from the sea water they float in, acting like a pollution sponges.
These studies have been conducted on plastic nurdles not just because of their uniform size and shape, thus easier to study and compare by scientifics, but also because of their wide spread presence on the world’s beaches.
In UK, mermaid tears are the second common plastic litter found on the beaches according to the Marine Conservation Society’s 2007 data and a Surfers Against Sewage (SAS) report.
According to Charles Moore, these resin pellets account for around 8 percent of annual oil production and are the raw material for the 260 million tons of plastic consumed yearly worldwide. Lightweight and small, they escape in untold volumes during transport and manufacture and wash in the ocean.
Even though these researches have been conducted on nurdles, it is crucial to keep in mind, as Dr. Takada team confirmed, that other types of plastic debris (from fishing gear, shopping bags, to small fragments) displays the exact same propensity as the nurdles of raw plastic resin to absorb toxins.
Nurdles covered beach. Photo Source: Algalita Foundation
It was shown that plastic pellets suck up these dangerous persistent organic pollutants (POPs) and toxins with a concentration factor that’s almost 1 million times greater compared to the overall concentration of the chemicals in seawater. In other words, waterborne hydrophobic pollutants do collect and magnify on the surface of plastic debris, thus making plastic far more deadly in the ocean than it would be on land.
These findings, published in the Marine Pollution Bulletin, were based on samples gathered from 30 beaches in 17 countries. PCB (Polychlorinated biphenyls) pollutant concentrations on plastic pellet were highest on US coasts, followed by Western Europe and Japan. The highest concentrations of DDT (Dichlorodiphenyltrichloroethane), the most toxic of all pesticides, were found on the US west coast and Vietnam.
Plastic marine debris, thought to be “indestructible”, “lasting forever”, has been shown to decompose faster than previously thought, under unexpected conditions (in the water and at sea temperature) and, most importantly, releasing toxic substances not found in the natural element: seawater.
DecomposeSince plastics belong to a chemical family of high polymers, they are essentially made up of a long chain of molecules containing repeated units of carbon atoms. Because of this inherent molecular stability (high molecular weight), plastics do not easily breakdown into simpler components.
North America, touched landscape. Photo Source: photobucket
The Marine Conservancy has published that the estimated decomposition rates of most plastic debris found on coasts are:
- Foamed plastic cups: 50 years
- Plastic beverage holder: 400 years
- Disposable diapers: 450 year
- Plastic bottle: 450
- Fishing line: 600 years.
These findings were reported on August 19, 2009, at the 238th National Meeting of the American Chemical Society (ACS). The scientists there termed the discovery “surprising.”
Dr. Saido described a new method to simulate the breakdown of plastic products at low temperatures (30º Celsius, 86º F), such as those found in some oceans. David Barnes, marine ecologist from the British Antarctic Survey, expressed that the Japanese’s team lab results cannot be applied uniformly across the ocean. However, even though the decomposition process would not occur in much cooler seawater as Barnes mentioned, the oceans are vast, currents are constant and permanent, nothing stays static and furthermore, it seems that garbage patches where plastics accumulate, are to be found in even greater dimension in the South Gyres, in the tropical and sub tropical zones with very warm waters. One of the researchers stated: “Even at 30 degrees Celsius, the plastic decomposes. In natural conditions, the tide comes in and sunlight heats the plastics [which increases decomposition].”
The type of plastic studied by Saido’s team was polystyrene, a white foamed plastic, commonly known by the trademark Styrofoam.
The process involved modeling plastic decomposition at room temperature, removing heat from the plastic and then using a liquid to extract the BPA and PS Oligomer that are not found naturally, thus must have been created through the decomposition of the plastic. Once degraded, the plastic was shown to release three new compounds not found in nature: styrene monomer (SM), styrene dimer (SD) and styrene trimer (ST). While SM is already a known carcinogen, SD and ST are suspected to be as well.
Plastics are not metabolized subsequent to ingestion since they are polymers. On the other hand, low molecular compounds such as PS oligomer or BPA from plastic decomposition are toxic and can be metabolized!
Samples of sea sand and seawater collected from Europe, India, Japan and the Pacific Ocean were found to be contaminated, with up to 150 parts per million of some of these components of plastic decomposition.
“Plastics in daily use are generally assumed to be quite stable,” said study lead researcher Katsuhiko Saido, Ph.D. “We found that plastic in the ocean actually decomposes as it is exposed to the rain and sun and other environmental conditions, giving rise to yet another source of global contamination that will continue into the future.”
This latest study clearly shows new micro-pollution by compounds generated by plastic decomposition to be taking place out of sight in the ocean, leaching toxic chemicals such as Bisphenol A (BPA) and derivatives of polystyrene.
Even though present in seawater and sands, the pollutants are found in highest concentration in areas heavily littered with plastic debris, such as ocean vortices, which bring us to define more specifically the notion of gyres and “garbage patches”.
Gyres and Garbage PatchesThe plastic litter defacing the beaches of the World, alarming in Hawaiian archipelagos for instance, led, only two decades ago, a couple of private and public teams of environmentalists and scientists to start conducting research regarding marine debris in the oceans.
Between 1985 and 1988, an Alaska- based team of researchers found high concentrations of marine debris accumulating in regions governed by vortices like pattern of ocean currents, which lead the National Oceanic and Atmospheric Administration (NOAA) of the United States to publish a paper, in 1988, mentioning the high probability of the existence of “a large area highly concentrating plastic waste debris in the North Pacific”.
Flyovers of the area have been conducted as well, but not in a conclusive way. The trash was not that obvious from the sky. Indeed, despite its size and density, the GGP is not visible from satellite photography because of its consistency, as Kaisei project and Scripps teams confirmed last August. The largest mass of the plastic pollution contains fragmented pieces of plastic, permeating the ocean, almost invisible to the naked eye, suspended at, or beneath the surface of the ocean.
Plastic soup. Photo: Charles Moore
He came upon an area, the Doldrums, a windless part of the ocean that mariners usually avoid. The area is filled with tiny phytoplankton, but few big fish or mammals, thus fishermen and sailors rarely travel through it. There, Charles Moore saw an ocean he had never known. Every time he stepped out on deck, “there were shampoo caps and soap bottles and plastic bags and fishing floats as far as I could see. Here I was in the middle of the ocean, and there was nowhere I could go to avoid the plastic.”
This area that Charles Moore came upon, the North Pacific Subtropical Gyre, is a slowly moving, clockwise spiral or vortex of currents created by a high-pressure system of air currents. He reported his find to Curtis Ebbesmeyer, an oceanographer, who named it the Eastern Garbage Patch.
Shocked by the extent of the plastic litter, Charles Moore went on alerting the world to the existence of this phenomenon.
Moore’s discovery was finally corroborating previous scientists’s, suspicions and extrapolations in regard to the existence of a high debris concentration in stable bodies of oceanic waters created over time by the rotating ring-like ocean currents system called gyres.
“We were out in the middle of the Pacific, where you would think the ocean would be pristine,” recalls the Alguita’s captain, Charles Moore. “…And instead, we get the Exxon Valdez of plastic-bag spills.”
Captain Moore’s giant floating debris field’s discovery has since been subject to other expeditions, and another “patch” was found further west.
Media light was finally brought in force at that point. Human kind has walked on the moon since 1969…yet the ocean was still quite an unknown frontier in our collective conscience.
GyresThe North Pacific gyre has given birth to two large masses of ever-accumulating plastic debris, known as the Western and Eastern Pacific Garbage Patches, collectively called the Great Pacific Garbage Patch (GGP). It is a gyre of marine litter in the Central North Pacific Ocean stretching for hundreds of miles across the ocean 1,000 miles from California coast on the East, to Japan and Hawaii on the West.
More specifically, a gyre is a large-scale circular feature made up of ocean currents that spiral around a central point, clockwise in the Northern Hemisphere and counterclockwise in the Southern Hemisphere. Gyres make up to 40 percent of the ocean. That is 25 percent of the globe. All of them are accumulators of debris, Moore says.
Worldwide, there are five major subtropical oceanic gyres: the North and South Pacific Subtropical Gyres, the North and South Atlantic Subtropical Gyres, and the Indian Ocean Subtropical Gyre. Since each behaves in the same vortex style, scientists are certain that massive conglomerates of marine litter like the North Pacific Garbage Patch exist in each of the world’s oceans. That is soberingly self-explanatory: such huge garbage patch, or even larger ones, are more than likely to be discovered in the near future.
North Pacific Gyre. Illustration: NOAA
Upon returning from their 22 days venture on the GGP, Project Kaisei and Scripps scientists’ stated in a press conference held in September 2009: “(we) hope our data gives clues as to the density and extent of marine plastic debris, especially since the Great Pacific Garbage Patch may have company in the Southern Hemisphere, where scientists say the gyre is four times bigger. “We’re afraid at what we’re going to find in the South Gyre, but we’ve got to go there,” said Tony Haymet, director of the Scripps Institution.
Garbage PatchesThe Great Garbage patch is two separate accumulations connected by a 6,000-mile marine litter “corridor” known as the North Pacific Convergence Zone (STCZ). As will be explained infra, the convergence zone is in itself another serious accumulator of traveling plastic debris.
The Eastern Pacific Garbage Patch floats between Japan and Hawaii; the Western Patch floats between Hawaii and California. The rotational pattern created by the North Pacific Gyre draws in waste material from as far as Asia to the USA. As material is captured in the currents, wind-driven surface currents gradually move floating debris inward, trapping debris in higher concentrations in the calm center. Ocean currents carry debris from the East coast of Asia to the center, in less than a year, and from the Western US in about 5 years.
North Pacific Subtropical Gyre. Illustration: Greenpeace
Great Garbage patch, floating debris. Photo Source: flyaddicts
We cannot emphasize enough that the GGP is now characterized by extremely high concentrations of suspended plastic debris for 90 percent, basically a soupy mix of plastic-filled seawater, made of tiny plastic debris that have been trapped by the currents and stretching for maybe thousands of miles, and that is the great problem.
Indeed, the researchers from Project Kaisei and the Scripps Environmental Accumulation of Plastic Expedition (SEAPLEX), after their journey through the area, collecting samples the whole way, reported: “All we could see, not at first glance but with magnifying glass and magnifying worries, for miles and miles, was an incredibly huge mass of confetti-like tiny mermaid tears, plastic fragments, floating just beneath the surface. ” As one of the scientist from the Project Kaisei witnessed: “There’s no island, there’s no eighth continent ” Miriam Goldstein said, “It doesn’t look like a garbage dump. It looks like beautiful ocean. But then when you put the nets in the water, you see all the little pieces.” And while the expedition covered 1,700 miles, members of the Kaisei team say the patch could be much, much larger…
As for its depth and assumed density, the scientists reported that the GGP’s waters were just clogged with plastic particles to a depth of 10 meters below the surface. The Scripps/ Kaisei survey mission of the gyre found that plastic debris was present in 100 consecutive samples taken at varying depths and net sizes.
In sum, they estimated the patch area ranged in size from 700,00 km2 to more than 15 million km2; the area may contain over 100 million tons of plastic debris.
Already in 1999, a study by Charles Moore, sampling waters from the GGP, found that the concentrations of plastic there reached one million particles per square mile, topping the concentration of zooplankton (plankton consisting of small animals and the immature stages of larger animals) by a factor of six. In 2008, the published new research from the Algalita foundation team of scientists estimated that the number had doubled.
After the return of the two vessels from Project Kasei and Scripps (Seaplex), Kaisei and New Horizon, the only certainty was that the size of the Great Pacific Garbage Patch remains uncertain. “It’s not a hard and fast number.” There has been extensive media coverage about the garbage patch over the past couple years; however, its reported size and mass have differed from news article to article. “It’s a little bit like a whirlpool on the surface of a river or a lake. You’d be hard-pressed to tell me where the edge is. All you know is that it’s stronger in the middle than it is in the outer reaches. But it’s an area of many hundreds of miles, perhaps thousands, in which the ocean currents tend to bring it together,” according to Robert Knox, deputy director for research at the Scripps Institution.
In the summer of 2010, Project Kaisei will launch its second expedition to the North Pacific Gyre where it will send multiple vessels to continue marine debris research and, in particular, to test an array of larger marine debris collection systems.
Marine debris collection at the GGP. Photo: Lindsey Hoshaw
A great and well known example is the North Pacific Subtropical Convergence Zone (STCZ). It is located along the southern edge of an area known as the North Pacific Transition Zone. NOAA has focused on the STCZ because it is an area triggering massive debris accumulation in Hawaii. This area does not have distinct boundaries and varies in location and intensity of convergence throughout the year. This zone moves seasonally between 30º and 42º N latitude (approximately 800 miles), extending farther south (28ºN) during periods of El Niño (Donohue and Foley, 2007).
The August 2009 expedition was so dauntingly successful and the findings were so”shocking”, that “…Scripps’ officials are now working to raise funds for a trip to the South Pacific gyre, sometime within the next two years”, Haymet announced at a press conference last August. “That project’s scope is far greater. While the North Pacific patch appeared as large as the Continental US, its South Pacific cousin is suspected to be about four times as large”, roughly the size of all of Western and part Eastern Europe.
II: The Path To Successful ResolutionThis unprecedented plastic waste tide appears as vast as the ocean, as ungraspable as the unfathomable mass of microscopic plastic fragments present at sea, transported by winds and currents, yet, ultimately, the plastic tide can become as limited as our chosen relationship with plastics, which involves a dramatic behavioral change on our part. The path to successful resolution of the crisis clearly appears…as we are the problem and the solution.
The Victims and The AggressorsThe despondent effects and too numerous casualties of the great plastic tide are visible, but more alarmingly, beyond visual, which ought to prompt the perpetrators to choose no other path than the advocacy and culture of consistent and sustained behavioral changes.
Creek in Manilla, Philippines, March 01 2009. Photo: Francis R. Malasig
AnimalsFrom the whale, sea lions, and birds to the microscopic organisms called zooplankton, plastic has been, and is, greatly affecting marine life, i.e animals on shore and off shore, whether by ingestion or entanglement.
In a 2006 report, Plastic Debris in the World’s Oceans, Greenpeace stated that at least 267 different species are known to have suffered from entanglement and ingestion of plastic debris. The National Oceanographic and Atmospheric Administration said that plastic debris kills an estimated 100,000 marine mammals annually, millions of birds and fishes.
The largest pieces of marine plastic debris, miles long discarded fishing nets and lines mostly, take an obvious toll on animals. These derelicts nets, called ghost nets, snare and drown thousands of larger sea creatures per year, such as seals, sea lions, dolphins, sea turtles, sharks, dugons, crocodiles, seabirds, crabs, and other creatures. Acting as designed, these nets restrict movement causing starvation, laceration, infection, and, in animals that need to return to the surface to breathe, suffocation.
Entangled seal by derelict net, Hawaii. Photo Source: NOAA
Turtle eats plastic. Photo Source: Greenhouse Carbon Neutral Fdn
Albatross and others birds are choosing plastic pieces because of their similarity to their own food as well. Captain Moore and his Alguita team did see, above the GGP, albatrosses and tropicbirds circling above the line of trash. With little else to choose, they were obviously eating plastic. The birds seemed to be picking and choosing “the reds and pinks and browns. Anything that looks like shrimp,” Moore says. Earlier in the trip, the Alguita had visited the French Frigate Shoals, off Hawaii, home to endangered monk seals and seabird rookeries. In the birds’ gullets researchers found red plastic particles. Greenpeace reported that a staggering 80 percent of seabird populations observed worldwide have ingested plastics. Research into the stomach contents of dead Fulmars from the Netherlands, between 1982 and 2001, found that 96 percent of the birds had plastic fragments in their stomachs with an average of 23 plastic pieces per bird (Van Franeker and Meijboom, 2003).
Midway atoll, bird corpse. Photo: Chris Jordan
Midway atoll, bird corpse. Photo: Chris Jordan
In February 2004, a Cuviers Beaked whale (Ziphius cavirostris) was found washed ashore on the west coast of the Isle of Mull, Scotland. Cuviers beaked whales are rarely seen in coastal waters, as they are predominantly a deep-water species. The Hebridean Whale and Dolphin Trust took various skin and blubber samples and removed the stomach for further study by the Scottish Agricultural College. On initial removal it was found that the entrance to the stomach was completely blocked with a cylinder of tightly packed shredded black plastic bin liner bags and fishing twine. It is believed that this made it difficult for the animal to forage and feed effectively.
50 to 80 percent of sea turtles found dead are known to have ingested plastic marine debris.
The smaller the pieces of plastic get, the more dangerous they are to marine organisms. Fragmented plastic, specifically nurdles and small size mermaid tears, are found in the stomach of smaller sea creatures as well: fish, birds, marine mammal, reptile, jelly fish, select plastic pellets as they resemble fish eggs.
Whether the chemicals contained in the plastics are then desorbed to digestive fluids and transferred to tissues in quantities significant enough to harm the animals is subject to ongoing, yet still incomplete, research. However, as more and more studies on the matter are undergone, unpleasant findings are definitly uncovered.
What is proven, as we’ve seen supra, is that plastic does soak up pollutants, acting as toxic-sponge for man-made toxins present in the ocean, thus accumulating pollutants such as polychlorinated biphenyls (PCBs) and heavy metals at concentrations up to 1 million times higher than in ocean water (Moore et al, 2001). PCBs can lead to reproductive disorders, death, an increased risk of disease, and an alteration of hormone levels (Ryan et al., 1988;Lee et al, 2001). They have been linked to the masculinisation of female polar bears and spontaneous abortions and declines in seal populations.
In 1988, Ryan et al obtained evidence that PCBs in the tissues of Great Shearwaters were derived from ingested plastic particles (from Derraik, 2002). Furthermore, DDT, a pesticide that was banned in the US in the 1960′s and labeled by the Environmental Protection Agency in 1987 as a “probable human carcinogen,” has been found on these plastics fragments. The most recent review of all evidence concludes that exposure to DDT before puberty increases the risk of breast cancer.
Food ChainIn a September press conference, Doug Woodring from Project Kaisei, said that assessments of the impact of plastic debris on phytoplankton, zooplankton, and mesopelagic (midwater) fishes are undergoing. The samples collected from the seawater will be subject to more scientific studies for the toxicity of the plastics and how this is really affecting our food chain (in ways that are only just becoming known… and not good ways).
Plastic found in Rainbow Runner fish guts. Photo Source: Algalita Marine Research Foundation
Whether plastics present a unanimously accepted and proven toxic challenge to marine life, and subsequently to humans, is one of the biggest challenges facing scientists right now.
HealthSaido’s latest science report last summer about the decomposition of polystyrene plastics vests a simple reality: Bisphenol A (BPA) has been shown and proven to interfere with the reproductive systems of animals. PS oligomer and BPA from plastic decomposition are toxic and can be metabolized, while styrene monomer is a suspected carcinogen. Low levels of BPA and PS oligomer have been proven to cause hormone disruption in animals.
More scientific reports are being published on the effects of Bisphenol A on animal and human health, and the news is not good.
In 2009, a professional, international medical organization in the field of endocrinology and metabolism, The Endocrine Society, reported data from new research on animals experimentally treated with BPA. Studies presented at the group’s annual meeting show BPA can affect the hearts of women, can permanently damage the DNA of mice, and appear to be entering the human body from a variety of unknown sources. A 2005 study, which analyzed BPA serum concentrations, concluded that “exposure to BPA is associated with recurrent miscarriage”.
The first major study of health effects on humans associated with bisphenol A exposure was published in September 2008 by Iain Lang and colleagues in the Journal of American Association. The cross-sectional study of almost 1,500 people assessed exposure to bisphenol A by looking at levels of the chemical in urine. The authors found that higher bisphenol A levels were significantly associated with heart diseases, diabetes, and abnormally high levels of certain liver enzymes.
A 2008 scientific review concluded that “prenatal exposure to (…) low doses of BPA alters breast development and increases breast cancer risk”. A 2009 scientific review, funded by the “Breast Cancer Fund”, has recommended “a federal ban on the manufacture, distribution and sale of consumer products containing bisphenol A”.
A 2009 study on urinary concentrations concluded that prenatal BPA exposure might be associated with externalizing behaviors in two-year old children, especially among female children.
A 2009 study on Chinese workers in BPA factories found that workers were four times more likely to report erectile dysfunction, reduced sexual desire, and overall dissatisfaction with their sex life than workers in factories that made products ranging from textiles to machinery, in which there was no heightened BPA exposure. They were also more likely to report reduced sexual function within one year of beginning employment at the factory, and the higher the exposure, the more likely they were to have sexual difficulties.
A 2009 review of available studies has concluded, “Prenatal BPA exposure acts to exert persistent effects on body weight and adiposity.”
A 2009 scientific review about environmental chemicals and thyroid function concluded, “Available evidence suggests that governing agencies need to regulate the use of thyroid-disrupting chemicals, particularly as such uses relate exposures of pregnant women, neonates and small children to the agents”. A 2009 review summarized BPA adverse effects on thyroid hormone action.
Kuta beach, Bali. Photo Source: Claude Graves
Beaches, Coast, Sea Floor, ShorelinesBlatantly visible is the plastic spill washing up on the shores and beaches. Just a walk on any beach, anywhere in the world, and plastic debris are found in one form or another. All over the world the statistics are ever growing, just staggeringly. Last year, an estimated 150,000 tons of marine plastic debris washed up onto the shores of Japan and 300 tons a day on India’s shores.
Layson Island, Hawaiian islands. Photo Source: NOAA
Two studies on several islands off Jakarta Bay and islands further to the northwest in the Java Sea, reported that debris pollution on shorelines had substantially increased between 1985 and 1995 (Uneputty and Evans 1997b, Willoughby et al. 1997). Both studies noted that results implicated Jakarta as a major source of the debris. On 23 of the islands, it was reported that the total litter at the strandline ranged from not detectable to 29.1 items/m (Willoughby et al. 1997). Plastic bags, polystyrene blocks, and discarded footwear accounted for 80 percent of the items found.
Researchers Barnes and Milner (2005) list five studies which have shown increases in accumulation rates of debris on mid to high latitude coasts of the southern hemisphere.
Surveys of shorelines around the world, reported by Greenpeace, have recorded the quantity of marine debris either as the number of items per km of shoreline or the number of items per square meter of shoreline. The highest values reported were for Indonesia (up to 29.1 items per m) and Sicily (up to 231 items per m).
Seabed Pollution. Photo Source: Bouteilles à la mer org.
Ecosystem ChangesAnother effect of the plastic tide that goes beyond visual is its potentiality to change entire ecosystems.
“Plastic is not just an aesthetic problem,” says marine biologist David Barnes of the British Antarctic Survey. “It can actually change entire ecosystems.” He has documented that plastic debris which floats on the oceans, acts as rafts for small sea creatures to grow and travel on. This represents a potential threat for the marine environment should an alien species become established. It is postulated that the slow speed at which plastic debris crosses oceans makes it an ideal vehicle for this. The organisms have plenty of time to adapt to different water and climatic conditions.
Coral ReefsDerelict fishing gear can be destructive to coral reefs. Corals are in fact animals, even though they may exhibit some of the characteristics of plants and are often mistaken for rocks. In scientific classification, corals fall under the phylum Cnidaria and the class Anthozoa. They are relatives of jellyfish and anemones. (NOAA)
Nets and lines become snagged on coral and subsequent wave action causes coral heads to break off at points where the debris was attached. Once freed, debris can again snag on more coral and the whole process is repeated. This cycle continues until the debris is removed or becomes weighted down with enough broken coral to sink (NOAA 2005a). Eventually, derelict fishing gear may become incorporated into the reef structure.
Plastic on Coral. Photo Source: EPA
EconomicsMarine litter cause serious economic losses to various sectors and authorities. Among the most seriously affected are coastal communities (increased expenditures for beach cleaning, public health and waste disposal), tourism (loss of income, bad publicity), shipping (costs associated with fouled propellers, damaged engines, litter removal and waste management in harbors), fishing (reduced and lost catch, damaged nets and other fishing gear, fouled propellers, contamination), fish farming and coastal agriculture.
Haina, Dominican Republic. Photo Source: Eduardo Munoz
The bill for cleaning the beaches in Bohuslän, on the west coast of Sweden, in just one year was reportedly at least 10 million SEK or $1,550,200. In Britain, Shetland fishermen reported that 92 per cent of them had recurring problems with debris in nets, with each boat losing between $10,500 and $53,300 per year as a result of marine litter. The cost to the local industry could be as high as $4,300,000. The municipality of Ventanillas in Peru has calculated that it would have to invest around $400,000 a year in order to clean its coastline, while its annual budget for cleaning all public areas is only half that amount. (Unep)
Our Oceans and coastlines are under unprecedented plastics waste attack. It’s coming back at us in many ways. It’s a dire problem that only received serious scientific and public attention in the early 90’s, as we know, but all along the perpetrators have simply and clearly been identified.
The AggressorsThe obvious and simple answer is: us…
Behind each and every piece of littered plastic debris there is a human face. At a critical decision point, someone, somewhere, mishandled it, either thoughtlessly or deliberately. Cigarette filters and cigar tips, fishing line, rope and gear, baby diapers and nappies, six-pack rings, beverage bottles and cans, disposable syringes, tires, the litany of plastic litter is as varied as the products available in the global marketplace, but it all shares a common origin.
Sources260 million tons per year is our estimated plastic consumption, 6 789 billion, is the estimated world population (United States Census Bureau, as of October 2009). Our voracious appetite for plastics, coupled with a culture of discarding products that we have chosen for their inherent longevity, is a combination of lethal nature for our environment.
Plastic Sea. Photo Source: Coastal wiki
Plastic bags are commonly found in waterways, on beaches, and in other unofficial dumping sites across China, for instance. Litter caused by the notorious bags has been referred to as “white pollution.”
In the United States, however, measures to ban or curtail the use of plastic bags have met with official resistance. With its powerful lobby, the plastics industry argues that jobs will disappear. The industry employs some two million workers. Americans alone throw out at least 100 billion bags a year, the equivalent of throwing away 12 million gallons of oil, which seems an intolerable waste. Until the U.S. follows the lead of San Francisco, China, Ireland, Uganda, South Africa, Russia, and Hong Kong and targets the reduction of plastic bags using legislature, we each need to make a conscious choice and refuse to use it.
The core of the plastic waste instillation in world’s oceans is primarily rooted in poor practices of solid waste management, a lack of infrastructure, various human activities, an inadequate understanding on the part of the public of the potential consequences of their actions, the lack of adequate legal and enforcement systems nationally and internationally, and a lack of financial resources affected to the cause. Mainly a consensus needs to happen, as a culture of behavioral changes needs to be promoted.
The four main land-sources of plastics debris have been identified as:
Shoreline and recreational activities related litterThis includes: bags, balloons, beverages bottles, cans, caps, lids, shoes, cups, plates, forks, knives, spoons, food wrappers/containers, six-pack holders, pull tabs, shotgun shells/wadding, straws, stirrers, toys, medical hygiene (condom, syringe), drug and smoking paraphernalia (The filters are made of cellulose acetate, a synthetic polymer (fiber) that can last for many years in the environment), and 55 gallons drums. All this land-based debris blows, washes, or is discharged into the water from land areas after people engaged in beach-going activities have discarded it.
Branscombe, United Kingdom, Photo: Matt Cardy
Shoreline activities account for 58 percent of the marine litter in the Baltic Sea region and almost half in Japan and the Republic of Korea. In Jordan, recreational activities contribute up to 67 percent of the total discharge of marine litter. This is a particularly big problem in the East Asian Seas region – home to 1.8 billion people, 60 percent of whom live in coastal areas – with its fast growing shipping and industrial development. Other emerging hotspots include the oil-boom coasts of the Caspian and the littoral states of Iran and Azerbaijan.
In South Asia, the growing ship-breaking industry has become a major source of marine debris. In Gujarat, India – one of the largest and busiest ship-breaking yards in the world – operations are carried out on a 10-kilometer stretch on the beaches of Alang, generating peeled-off paint chips and other types of non-degradable solid waste making its way into the sea.
Sewage (waste waters containing plastic type products, rivers, waterways)Under normal, dry weather conditions, most wastes are screened out of sewage in countries that do apply strict sewage treatment. However, materials can bypass treatment systems and enter waterways when rain levels exceed sewage treatment facilities’ handling capacity. During these times, sewage overflows occur.
The Yamuna River, which flows 855 miles from the Himalayas into the Ganges, is one of India’s most, but not only, polluted river. The Centre for Science and Environment says that nearly 80 percent of the river’s pollution is the result of sewage. Combined with industrial runoff, that comes to more than three billion liters of waste per day, a quantity well beyond the river’s assimilative capacity. Many Indian rivers are so polluted they exceed permissible levels for safe bathing.
Yamuna River in New Delhi. Photo: Manan Vastsyayana
Fishing related debrisDumping, wastes from ships, boats platforms (20%). Derraik (2002) stated that ships are estimated to dump 6.5 million tons of plastic a year. An estimated fourth fifths of the oceanic debris is litter blown seaward from landfills and urban runoff washed down storm drains. (Unep). Clean up on land where 80 percent of the plastic debris originates is thus the primarily obvious answer.
Manual Clean UpThe simplest, yet highly effective, action is the manual clean up of the beaches, coasts, rivers, lands and estuaries.
National and international manual clean-up operations of shorelines and sea floor are in existence.
For instance, the past 20 years, the Japan Environmental Action Network (JEAN) has been organizing a yearly beach cleanup and survey.
Hawaiin shores. Photo Source: epa.gov
The Clean Up the World program is run in conjunction with UNEP. It engages more than 40 million people from 120 different countries in clean up operations.
As part of its Rise Above Plastics campaign, Surfrider foundation is hosting frequent beach clean-ups; it is an example of an encouraging trend towards collective awareness and action to solve the problem at its source.
Worldwide private groups and associations are more and more aware that clean-up does need to happen, one day at a time, one person at a time.
Cleaning Up Of The Oceans Debris In The Open SeasNOAA has also been contacted regarding cleanup of the debris directly in the garbage patch and other areas of the North Pacific; however, cleanup is likely to be more difficult than it may seem. “If only things were that simple. We could just go out there and scoop up an island,” says Holly Bamford, director of NOAA’s marine debris program. “If it was one big mass, it would make our jobs a whole lot easier.” It’s like a galaxy of garbage, populated by billions of smaller trash islands that may be hidden underwater or spread out over many miles.
Derelict nets at the GGP. Photo Source: 20tv
As Captain Charles Moore once said: the cleaning up effort of the oceanic garbage patches “would bankrupt any country and kill wildlife in the nets as it went.”
However, confident in the future and investigating new horizons, Doug Woodring, from Project Kaisei, will be producing a documentary for National Geographic testing catch techniques for the plastic waste (“we know not all can be caught, but some can for sure”), at least for the largest debris that we know do decompose over time and actually more rapidly than previously thought.
Marine debris accumulation, on seafloor. Photo Source: NOAA
The ConsensusUndeniably a culture of behavioural changes, now in its infancy, need to further blossom and be implemented/prompted at all levels: individual, associative, governmental, legislative, industrial, technological, educational, philosophical, national, and international.
It simply starts with individual choices. That is the enormous task, yet the enormous power as well because it resides within each and every one of us. Indeed, thanks to an increased awareness of the plastic pollution spread, local, national, individual, and associative actions have taken place worldwide to stop the plastic hemorrhage at the source.
Education, Legislation, and Awareness
EducationThe starting point of all greater good does remain education and information.
More and more awareness and preventive programs are promoted.
For instance, in 2004, the Australian government launched a campaign called Keep the Sea Plastic Free, in which it attempted to educate the public to dispose of plastic waste properly.
Surfrider foundation is aiming to raise awareness of plastic marine debris and reduce the proliferation of single-use plastic bags and water bottles, as well as the number one littered item worldwide, cigarette butts. The Rise Above Plastics program also seeks to promote a more sustainable lifestyle and educate people about the prevalence of plastic marine debris on our beaches and oceans and how deadly it can be to marine life.
South East Asia – Philippines, 2008. Photo: Tamara Thoreson Pierce
Tridoyo estimated that some 40 tons of waste have been dumped into rivers and other waterways daily in surrounding areas and thus polluting the Java Sea. A campaign against river and sea pollution has been called, and people are urged to change their culture of throwing garbage into waterways and other common places.
Being educated on the situation and aware of the consequences ultimately leads us toward better choices in term of consumption and waste management of plastic at an individual level. It can be as simple as refraining from discarding plastic after first use…plastic inherently chosen for its durability.
Albatrosses on Midway atoll. Photo Source: dailylife
Instantaneous, prompt eradication of plastics in its current form, rate of production, and consumption is not realistically feasible, yet constant pressure is impacting industry and politicians to “think green,” to have environmentally responsible approach, production, prevention plans, and legislations.
Extend Producer ResponsibilityRelentless associative campaigns have proven that change can happen, such as the recent victory from the Uk’s Surfers Against Sewage (SAS) campaign against mermaid tears.
“SAS launched a campaign to rid British coastlines of mermaid tears, and will continue to build up until factory practice changes.” On June 5th 2009, the release of the British Plastic Federation’s (BPF) Operation Clean Sweep (OCS) guidance manual was a victory on the preventive field. OCS is aimed at improving British plastic factories efficient use of plastic pellets, commonly referred to as mermaid’s tears.
SAS initially highlighted the problem of mermaid’s tears on UK beaches to the BPF in 2007, delivering a bottle of 10,000 mermaid’s tears, collected from one Cornish beach, to a BPF biopolymer seminar. SAS also released a covert film documenting mermaid’s tears in the storm drains of plastic factories in the southwest, highlighting the route from factory to beach. SAS and the BPF have worked together on the OCS solution. SAS has already signed up Contico, one of the southwest’s largest plastic factories, to pilot some of the improvements within OCS.
Shoichiro Kobayashi, from The Japan Plastics Industry Federation, says that its members have taken measures to reduce spillage of plastics nurdles.
“Awareness of the problem is high,” says Kobayashi, and has been since JEAN and other NPOs started publicizing the issue about 15 years ago. The federation has about 1,000 members. Together with the 2,200-member All Japan Plastic Products Industrial Foundation, the two groups represent the largest plastic producing companies in Japan. Kobayashi says his organization encourages members and associated transport companies to avoid spillage and to cover all drainage pipe openings with wire mesh. That’s helped reduce the problem at larger companies, but there are more than 20,000 producers of plastic goods in Japan.
On September 22nd 2009 in California, a press conference was held by DTC director Maziar Movassaghi and Project Kaisei founder Mary Crowley, along with representatives from the State of California and various nonprofit groups. They pushed for Extended Producer Responsibility, the philosophy that companies that create products must take responsibility for the full life cycle of those products, products that are “benign by design.” Mary Crowley added, “Let’s reduce the source of this pollution by not only choosing healthy, plastic-free products ourselves, but also urging our legislators to pass Extended Producer Responsibility legislation. In fact, such a bill is currently on the table in the state of California. AB283, the California Product Stewardship Act, is an important step in this process.”
Changzhi, Shanxi Province. Photo: Stringer Shanghai
Legislation And International Concerted Programs
InternationallyIn 1972, the London Convention, a United Nations agreement to control ocean dumping, was entered into. It was followed by the most well known piece of International legislation, the International Convention for the Prevention of Pollution from ships (MARPOL). Annex V of MARPOL was introduced in 1988 with the intention of banning the dumping of most garbage and all plastic materials from ships at sea. A total of 122 countries have ratified the treaty. There is some evidence that the implementation of MARPOL has helped to reduce the marine debris problem.
UK Beach. Photo Source: SWNS
The Water Framework Directive of 2000 is a European Union directive committing EU member states to make their inland and coastal waters free from human influence. In the United Kingdom, the proposed Marine Bill is designed to “ensure clean healthy, safe, productive and biologically diverse oceans and seas, by putting in place better systems for delivering sustainable development of marine and coastal environment”.
Under the umbrella of UNEP, numerous cooperative efforts have been held to reach protocols and conventions.
For instance, a Protocol on Integrated Coastal Zone Management was approved in January 2008, involving 21 countries bordering the Mediterranean Sea, as well as the European Union. Within the framework of Land Based Sources Protocol for pollution reduction from land-based sources, Mediterranean countries and parties to the Barcelona Convention have agreed this year on an initial set of actions covering the reduction of municipal pollution and the elimination of a number of Persistent Organic Pollutants.
The Caribbean Environment Programme (CEP) continues to encourage member states in meeting the Caribbean Challenge target of protecting 20 percent of marine and coastal habitats by 2020. The Caribbean Large Marine Ecosystem Project and development of a Regional Fund for Wastewater Management will support regional collaboration to reduce the vulnerability of sensitive coastal and marine ecosystems by improving national and regional governance structures and developing new and innovative mechanisms for financing new pollution reduction activities.
Even though the greatest problem with international legislation is its actual enforcement, the efforts toward concerted actions can only be promoted.
NationallyA strict Chinese limit on ultra-thin plastic bags significantly reduced bag-related pollution nationwide during the past year. “Our country consumes a huge amount of plastic shopping bags each year” a spokesperson for China’s State Council said, when announcing the ban last May.
“While plastic shopping bags provide convenience to consumers, this has caused a serious waste of energy and resources and environmental pollution because of excessive usage, inadequate recycling and other reasons.” In January 2008, The State Council, China’s parliament, passed legislation to prohibit shops and supermarkets from providing free plastic bags that are less than 0.025 millimeters thick. The State Administration of Industry and Commerce also threatened to fine shopkeepers and vendors as much as 10,000 Yuan ($1,465) if they were caught distributing free bags.
The country avoided the use of 40 billion bags, according to government estimates. The National Development and Reform Commission (NDRC) estimated that the limit in bag production saved China 1.6 million tons of petroleum.
The first country to ban plastic bags was Bangladesh, which did so in 2002. Following a particularly damaging typhoon, authorities discovered that millions of bags were clogging the country’s system of flood drains, contributing to the destruction.
In the same year, Ireland took another approach and instituted a steep tax on plastics. According to the country’s Ministry of Environment, use fell by 90 percent as a result and the tax money that was generated funded a greatly expanded recycling program throughout the country. In 2003, the government of Taiwan put in place a system by which bags were no longer made available in markets without charge. Carryout restaurants were even required to charge for plastic utensils.
Larger economies have joined the cause and passed legislations on a national level. In 2005, French legislators imposed a ban on all non-biodegradable plastic bags, which will go into effect in 2010. Italy will also ban them that year.
During its 2008 session, the New York State Legislature passed legislation requiring the reduction, reuse, and recycling of checkout bags. The previous year, the city of San Francisco banned plastic bags altogether, at least the flimsy ones of yore. National Public Radio reported a few months later that the ban had been a boom for local plastics manufacturers, who have been introducing heavy-duty, recyclable, and even compostable bags into the marketplace.
Media And Creative AwarenessAn impactful vehicle for information and awareness is indubitably found in the media and creative ventures.
A good example of such ventures is the team of two South African surfers, Ryan and Bryson Robertson, and one Canadian, Hugh Patterson, who created the OceanGybe mission. Their plan is to circumnavigate the globe in a small 40ft sailboat and surf remote reef breaks on far flung islands while interacting with the local cultures. They intend to spread awareness of the vast tracts of plastic and trash afloat on the world’s oceans that inevitably ends up on some unsuspecting shore.
Fishing debris on beach. Photo Source: unknown
The Plastiki, a one-of-a-kind 60-foot catamaran, was created out of 10,000 reclaimed plastic soda bottles, self-reinforced PET (polyethylene terephthalate) and recycled materials. The vessel’s name is a nod to famed explorer Thor Heyerdahl, who led a 1947 voyage on the Kon-Tiki to test theories of Polynesian settlement by South Americans. The Plastiki is about to make its momentous voyage across the Pacific Ocean, a 10,000-mile expedition from San Francisco to Sydney, Australia by the end of this year, to inspire people to rethink current uses and waste of plastic as a resource and bring attention to the GGP.
De Rothschild explained that Plastiki’s construction has already jump-started research into a future “smart plastics” industry before ever leaving port. For instance, studies are underway on glues that could someday replace common marine epoxies and plastics that could replace non-recyclable fiberglass.
“The Plastiki voyage will be a great adventure, but I think more exciting is the ability to create a conversation on the issue of plastics.”
PhilosophyAdventures of philosophical nature have been taking place as well.
Indeed, French thinkers such as Michel Serre or Luc Ferry, The new ecological order, have developed a train of thought aiming towards a legal recognition, therefore legal protection of Nature. This type of philosophy has been called, deep ecology. The principle is quite simple: democracies have installed their legislative framework, their “social contract,” omitting Nature as a protagonist/subject of law. Therefore, to protect Nature, i.e. our environment, should we confer legal right to it, thus making nature a legal subject/person?
Obviously, all subject of law have rights, but they also have obligations. If we can easily forsee what the right and protection would be for this legal subject, what would be its obligations?
This leads many thinkers towards a notion of “droit ou devoir d’ingerence ecologique” (right or duty of intervention/assistance), trying to mirror the situation on the humanitarian field. The notions of “self defense” and “non assistance a personne en danger” have also been explored as possible legal frames to better enforcement of laws and conventions aimed to protect the environment, and curb ocean plastic pollution for that matter.
Décharge Plage, Albanie. Photo: ©© Antoine Giret / Un2Vue
Sustainable And Future Technologies – Opportunities and Innovations
Biodegradable plasticsBiodegradable plastics have been considered as a future, sustainable option to curb our voracious demand and consumption of plastic material as known in its current form. According to the Biodegradable Plastics Society (2005), when such plastics are composted they break down to carbon dioxide and water.
Controversy does exist though, because it is possible that biodegradable plastics do not break down fully, especially under environmental conditions which are not ideal for composting, and leave non-degradable constituents, some of which may be equally, if not more, hazardous. Also, there is a danger that biodegradable plastics will be seen as “litter friendly” materials, conveying the wrong message to the public and potentially leading to less responsible and more wasteful practices.
A change in behavioral propensities to over-consume plastics, discard and thus pollute, need to be promoted to the fullest.
Ongoing discoveries and solutions to the traditional plastic waste problemScientists have been searching for solutions to the traditional plastic waste problem.
In 2008 and 2009, two high school students who discovered plastic-consuming microorganisms, might have found groundbreaking solutions.
Haitian Coast. Photo Source: unknown
Daniel’s simple and clever process was to immerse ground plastic in a yeast solution that encourages microbial growth, then isolating the most productive organisms. After several weeks of tweaking and optimizing temperatures, Burd was achieved a 43 percent degradation of plastic in six weeks, an almost inconceivable accomplishment. It appeared as an environmentalist’s dream: a non-chemical, i.e. fully organic, low cost and nontoxic method for degrading plastic.
There have been several successful bacteria based solutions developed at the Dept. of Biotechnology in Tottori, Japan, as well as at the Dept. of Microbiology at the National University of Ireland, but both apply only to styrene compounds.
Similarly, a 2004 study at the University of Wisconsin isolated a fungus capable of biodegrading phenol-formaldehyde polymers previously thought to be non-biodegradable.
Green chemistry and “begnign by design” conceptA growing interest amongst chemists, and ultimately industries, is Green chemistry- policy, also called “benign by design”.
According to scientists at the University of Southern Mississippi (USM), a new type of environmentally friendly plastic that degrades in seawater may be developed. Robson F. Storey, Ph.D., a professor of Polymer Science and Engineering at USM, said, “We’re moving toward making plastics more sustainable, especially those that are used at sea.” Their study is funded by the Naval Sea Systems Command (NAVSEA), which is supporting a number of ongoing research projects aimed at reducing the environmental impact of marine waste. The new plastics are made of polyurethane that has been modified by the incorporation of PLGA [poly (lactide-co-glycolide)], a known degradable polymer used in surgical sutures and controlled drug-delivery applications. When exposed to seawater, the plastics degrade via hydrolysis into nontoxic products, according to the scientists. The plastics are not quite ready for commercialization. “More studies are needed to optimize the plastics for various environmental conditions they might encounter, including changes in temperature, humidity and seawater composition”, Storey says.
A new kind of material, called oxo-biodegradable plastic, does not just fragment, but is consumed by microorganisms after the additive has reduced the molecular weight. It is thus biodegradable. This process continues until the material has biodegraded to nothing more than CO2, water, humus, and trace elements. There is little or no additional cost, as it can be made with the same machinery and workforce as conventional plastic. The time taken to degrade can be programmed to a few months or a few years and, until the plastic degrades, it has the same strength and other characteristics as conventional plastic. Oxo-biodegradable plastic will be engineered to degrade in a short time leaving no harmful residues.
Recycling and Zero Waste conceptA promising way toward a future of better plastic waste management is recycling the material. The recycling industry might eventually be a path leading to considerable opportunities and solutions.
Photo: The Midway Journey
However, this industry is faced with many challenges, as the recycling material itself is very diverse in a chemical sense and can release, when processed, extremely dangerous chemicals. For instance, a recycling factory in China was recently exposed to tragic consequences due to the recycling of very hazardous plastic materials. It was reported that a team of workers in China’s Zhejiang province collapsed after handling two metric tons of plastic scrap on September 13, 2009. At least 21 have since been hospitalized and three of them have died. According to the initial investigative conclusions, the victims were in contact with highly toxic chemical, dinitrophenol, which was found on the two tons of plastic scrap. Workers at the recycling factory were unaware of the hazard of the material and had no protection during the unloading. This particular tragedy is only the tip of the iceberg. China’s plastics recycling industry is poorly regulated, with scandals such as biohazard plastic waste being melted and reprocessed into consumer goods.
Recycling is definitely a potentially great path to solving the plastic waste problem but definitely not the most unchallenging one.
Along the same lines, a responsible waste strategy, namely the concept of Zero Waste, has been widespread. Such a strategy encompasses waste reduction, reuse and recycling as well as producer responsibility and ecodesign. According to a Greenpeace report, strategies to achieve Zero Waste are adopted throughout the world, in industrialized countries and in less developed countries.
Ultimately, this would mean reduction of the use of plastics. “Our understanding of disposal and reuse (of plastic, is what) is to blame.” as many environmentalist such as de Rothschild, said.
This zero waste philosophy encourages the redesign of resource’s life cycles, so that all products are reused. Any trash sent to landfills is minimal. The process recommended is one similar to the way that resources are reused in nature. Zero waste can represent an economical alternative to waste systems, where new resources are continually required to replenish wasted raw materials.
DTSC’s Environmental Chemistry Laboratory is currently analyzing some of the plastic marine debris collected at the Great Garbage Patch by Project Kaisei scientists, and explores the potential of converting the plastic collected into new material.
Indeed, Doug Woodring from Project Kaisei stated last September that they intend to use some of the newest plastic technologies to detoxify and turn the plastic waste caught in the oceans either into fuel or another useable material. Thus, Project Kaisei hopes to assign value to that plastic collected, particularly the overwhelming majority that is never recycled. It becomes obvious that technologies that convert plastic to fuel, clothing, or simply more profitable plastic could give people a good reason to pick up all that plastic and make a profit from it. Numerous industries, such as fashion, are already increasingly focusing on new green materials as a base for their offered products, encouraging a way of life and cultural change toward better choices and awareness of the environment.
“It’s controllable,” DougWoodring said. “We have to let people know that enough is enough, but it’s not just a negative story about toxicity and wrecking our oceans. There is a huge amount of opportunity for innovation.”
Conclusion“The impossible missions are the only ones which succeed.”
—Commandant Jacques-Yves Cousteau.
The abysmal depth and extent of the task before us ought to be never as inexhaustible and boundless as our dedication and compelling strive to greater changes.