Alexei Volkov
There are five plastic islands in the oceans, also known as garbage patches. These are located in the North Pacific, the South Pacific, the North Atlantic, the South Atlantic, and the Indian Ocean. The plastic islands are formed when floating waste enters ocean eddies, and they threaten to destroy marine life and contribute to climate change. The Great Pacific Garbage Patch, located between Hawaii and California, is the largest accumulation of ocean plastic in the world. It covers 1.6 million square kilometres and contains 80,000 metric tons of plastic.
| Characteristics | Values |
|---|---|
| Number of plastic islands | 5 |
| First discovered | 1997 |
| Locations | North Pacific, North Atlantic, South Atlantic, Indian Ocean, South Pacific |
| Size | 1.6 million square kilometres (0.62 million square miles) |
| Weight | 80,000 metric tons |
| Number of plastic pieces | 1.8 trillion |
| Percentage of mass in objects larger than 0.5 centimetres | 92% |
| Percentage of plastic pollution from fishing and agriculture | 75% to 86% |
| Top sources of plastic pollution | Japan, China, South Korea, the US, and Taiwan |
| Impact on marine life | Kills more than a million animals a year |
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What You'll Learn
The Great Pacific Garbage Patch
The GPGP is the largest accumulation of plastic in the open ocean and is one of five offshore plastic accumulation zones in the world's oceans. It covers an estimated 1.6 million square kilometres, an area twice the size of Texas or three times the size of France. The patch is made up of 45,000–129,000 metric tons of plastic, with 1.8 trillion plastic pieces. The mass of the plastic in the patch has been estimated to be approximately 100,000 tonnes, though this figure may be much higher as it is difficult to measure the patch accurately. The patch is not a continuous island of trash but is instead a widely dispersed area consisting primarily of "fingernail-sized or smaller"—often microscopic—particles in the upper water column known as microplastics. These microplastics can be harmful to marine life as they can be consumed by marine organisms and enter the food chain.
The plastic in the GPGP originates from the Pacific Rim, including countries in Asia, North America, and South America. A 2022 study found that 75-86% of the plastic pollution in the patch comes from fishing and agriculture, with the most identified emissions originating from Japan, China, South Korea, the US, and Taiwan. The US was reported to be the third-largest contributor to plastic pollution in coastal environments in 2020. A 2018 study also found that synthetic fishing nets made up nearly half the mass of the GPGP due to ocean current dynamics and increased fishing activity in the Pacific Ocean.
Efforts are being made to clean up the GPGP. The Ocean Cleanup, for example, has removed millions of kilograms of trash from the patch since 2021. However, the cleanup process is challenging due to the size and dispersion of the patch. No nation has taken responsibility or provided funding for the cleanup, and Charles Moore, who discovered the patch, has stated that cleaning it up would "bankrupt any country".
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Plastic islands in the Mediterranean and Caribbean
There are five plastic islands in the world's oceans, with the first discovered in 1997 in the North Pacific. The remaining four plastic islands are located in the North Atlantic (discovered in 2009), the Indian Ocean (2010), the South Pacific (2011), and the South Atlantic (2017). These plastic islands are formed by floating waste that becomes trapped in ocean eddies, and they pose a significant threat to marine life and the environment.
While not as large as the five major plastic islands, there are also plastic accumulations in other seas, such as the Mediterranean and the Caribbean. In 2019, a floating "island" of plastic waste was spotted in the Mediterranean Sea between the French island of Corsica and the Italian island of Elba. This plastic "island" formed due to currents carrying waste north, and it poses a risk of washing up on the Corsican coast during poor meteorological conditions. The Mediterranean Sea is particularly vulnerable to plastic pollution due to high population densities and other factors, with the Republic of Cyprus having the highest per-capita plastic waste generation in Europe.
To address plastic pollution in the Mediterranean, the IUCN has launched initiatives such as the Plastic Free Islands in the Mediterranean project. This project aims to reduce plastic waste leakage from island states and improve waste management practices. It focuses on three plastic waste-related sectors (tourism, fisheries, and waste management) across three islands, with the goal of implementing plastic leakage reduction measures.
In the Caribbean, the issue of plastic pollution has also been recognised, with governments working on measures to curb it. The Plastic Waste Free Islands (PWFI) project, supported by Norad, aims to reduce plastic waste generation and leakage into the ocean in Caribbean island nations. Economic assessments conducted in Antigua and Barbuda, Grenada, and St Lucia examined the impacts of marine plastics on the fisheries and tourism sectors. Additionally, measures such as bans on single-use plastics and polystyrene, which make up around 80% of Caribbean marine litter, are being implemented to mitigate plastic pollution in the region.
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The 5 oceanic plastic islands
While not marked on any maps, there are five plastic islands floating in the oceans, threatening marine life and contributing to climate change. These islands are the result of over six decades of waste dumping into the ocean, mostly from land and sea traffic.
The first of these five garbage patches, the Great Pacific Garbage Patch, was discovered in 1997 by American oceanographer Charles Moore. It is located between Hawaii and California and is the largest accumulation of ocean plastic in the world. The patch covers 1.6 million square kilometres, with a concentration of 10-100 kilograms per square kilometre. It is estimated to contain 80,000 metric tons of plastic, with 1.8 trillion plastic pieces, 92% of which are larger than 0.5 centimetres. The patch is made up of microplastics, which are tiny fragments of plastic eroded from larger pieces, as well as abandoned fishing gear and waste from ships.
The other four plastic islands are located in the North Atlantic (discovered in 2009), the Indian Ocean (2010), the South Pacific (2011), and the South Atlantic (2017). These garbage patches are not as large or concentrated as the Great Pacific Garbage Patch, but they still pose a significant threat to marine life and the environment.
The plastic islands are a constant reminder of the impact of human activity on the planet and the urgent need to address the issue of plastic pollution in our oceans.
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Plastic islands threaten marine life
There are five plastic islands in the oceans, also known as garbage patches, threatening marine life and contributing to climate change. These plastic islands are the result of more than six decades of waste dumping into the ocean, mostly from land and sea traffic. The plastic islands are located in the North Pacific, the South Pacific, the North Atlantic, the South Atlantic, and the Indian Ocean.
The Great Pacific Garbage Patch, located between Hawaii and California, is the largest accumulation of ocean plastic in the world. It covers an estimated 1.6 million square kilometres, with a concentration of 10 to 100 kilograms per square kilometre. The patch is made up of microplastics, often microscopic particles, that are suspended in the upper water column. These microplastics are ingested by marine animals, causing intestinal injuries and death. They can also absorb and leach out harmful pollutants, which then enter the food chain when consumed by marine life.
The plastic islands threaten marine life in several ways. Firstly, marine animals can become entangled in plastic debris, leading to injury and death. This is particularly common with discarded fishing nets, also known as ghost nets, which account for a significant portion of the mass in the Great Pacific Garbage Patch. Endangered species such as Hawaiian monk seals and Pacific loggerhead sea turtles are among the victims of plastic entanglement.
Secondly, marine animals often mistake plastic for food, leading to malnutrition and starvation. Studies have found plastic in the guts of fish sold at markets in California, and research indicates that half of the sea turtles worldwide have ingested plastic. Seabirds are also affected, with an estimated 60% of all seabird species having eaten plastic, and this number is predicted to increase to 99% by 2050.
The plastic islands also contribute to climate change by emitting greenhouse gases such as ethylene and methane when decomposed in the sun. The economic impact of ocean plastic pollution is significant, with costs of $13 billion per year, and it also affects the livelihoods of small fishing communities.
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Plastic islands contribute to climate change
There are five plastic islands in the oceans, also known as garbage patches, threatening marine life and contributing to climate change. These islands are the result of more than six decades of waste dumping into the ocean, mostly from land and sea traffic. The plastic islands are located in the North Pacific, the North Atlantic, the South Atlantic, the Indian Ocean, and the South Pacific.
Plastics also act as a source of heat-trapping gases throughout their life cycle. As plastics break down through photodegradation, they release harmful chemicals and pollutants, such as bisphenol A (BPA), into the environment. These chemicals have been linked to environmental and health issues. Additionally, plastics can absorb pollutants from seawater, such as PCBs, which then enter the food chain when consumed by marine life.
The impact of plastic islands on marine life further exacerbates climate change. The garbage patches decimate marine ecosystems, killing over a million animals annually. This disrupts food chains, impacting populations of apex predators like tuna, sharks, and whales, and ultimately reducing the availability and increasing the cost of seafood for humans.
The presence of plastic islands also affects the livelihoods of small fishing communities and damages air quality, contributing to global warming. Polyethylene, a commonly used disposable plastic, emits greenhouse gases such as ethylene and methane when decomposed in sunlight.
The plastic islands in the oceans are a stark reminder of the urgent need to address plastic pollution as an integral part of climate change mitigation efforts.
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Frequently asked questions
There are five plastic islands, also known as garbage patches, in the oceans around the world.
The plastic islands are located in the North Pacific, North Atlantic, South Atlantic, Indian Ocean, and South Pacific.
The plastic islands are made up of plastic waste that has been dumped into the ocean, mostly from land and sea traffic. The plastic breaks down into smaller pieces, known as microplastics, that float inside the oceans' eddies and are trapped in whirlpools.
