Brian Barton
Plastic pollution is a pressing issue that affects all land, freshwater, and marine ecosystems. It is estimated that 8 million to 11 million tonnes of plastic enter our oceans each year, threatening wildlife and ecosystems. The sources of plastic pollution are primarily land-based, including urban and stormwater runoff, littering, industrial activities, tyre abrasion, construction, and agriculture. In the marine environment, plastic pollution comes mainly from land runoff, discarded fishing gear, and paint shed from shipping. Plastic production has sharply increased over the years, with an annual production of over 400 million tons, and this number is expected to triple by 2060. However, only about 9% to 10% of plastic waste is recycled globally, with the rest being burned, buried, or polluting the environment.
| Characteristics | Values |
|---|---|
| Annual plastic production | 300-460 million tons |
| Percentage of plastic production from fossil fuels | 99% |
| Percentage of plastic ever recycled | 9-10% |
| Percentage of plastic ever incinerated | 12% |
| Percentage of plastic accumulated in landfills, dumps, or the natural environment | 79% |
| Annual plastic pollution in the ocean | 8-11 million tons |
| Percentage of plastic pollution in the ocean from Asian countries | 86% |
| Percentage of plastic pollution in the ocean from land runoff | High |
| Percentage of global plastic leakage in 2019 that was macro-plastic | 88% |
| Volume of global plastic leakage in 2019 | 20 million tons |
| Number of marine mammals killed by marine plastic pollution annually | 100,000 |
| Number of sea birds killed by marine plastic pollution annually | 1,000,000 |
| Percentage of studied marine debris that is plastic | 80% |
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What You'll Learn
Plastic in oceans
Plastic in the oceans is a critical global issue. It is estimated that 8 million metric tons of plastic entered the ocean in 2010, and the problem has only grown since. With the ever-increasing production and consumption of plastic, billions of pounds of plastic end up in the world's oceans annually, polluting about 40% of the world's ocean surfaces. This plastic pollution crisis is not limited to a specific region but extends from the equator to the poles, from the Arctic ice sheets to the sea floor.
The primary sources of plastic in the oceans are land-based, including urban and stormwater runoff, littering, industrial activities, tyre abrasion, construction, and agriculture. Rivers play a significant role in transporting plastic from land to sea, with coastal cities in middle-income countries being the hotspots for plastic emissions. However, not all plastic in rivers reaches the ocean, as some sink to the riverbed or get stuck along the river system.
Once in the ocean, plastic never fully biodegrades. Some plastic floats, while some sinks, and much of it breaks down into tiny pieces called microplastics. These microplastics can absorb harmful pollutants like pesticides, dyes, and flame retardants, only to later release them into the ocean. The presence of microplastics in the ocean is a significant concern, as they can be ingested by marine life, causing internal injuries and death.
The impact of plastic pollution in the oceans is devastating for marine life and ecosystems. Marine animals, including birds, whales, fish, and turtles, often mistake plastic waste for food, leading to ingestion and intestinal injuries. They can also become entangled in plastic debris, causing injury and mortality. The problem is so severe that plastic is expected to outweigh all the fish in the sea by 2050.
Addressing the issue of plastic in the oceans requires a global effort. Strategies include reducing plastic production, improving waste management practices, promoting recycling, and investing in waste management infrastructure, especially in low-to-middle-income countries. By implementing these measures, we can work towards mitigating the devastating effects of plastic pollution on our oceans and the diverse life they support.
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Plastic production increase
Plastic production has sharply increased over the last 70 years. In 1950, the world produced just two million tonnes. It now produces over 450 million tonnes, with the latest data from 2023 showing a global production of 413.8 million metric tons. Even just in the last two decades, global plastic production has doubled.
The reasons for this increase are varied, but the versatility of plastic is a key factor. Plastics are used in a wide variety of products and have displaced other materials such as wood, metal, and glass. One of the main applications for plastics is packaging. Plastic is a cheap, versatile, and sterile material used in construction, home appliances, medical instruments, and food packaging. It is also used in textiles, adhesives, sealants, and coatings. The production of plastic requires four basic steps: the acquisition of raw material, synthesizing a basic polymer, compounding the polymer into a usable fraction, and lastly, molding or shaping the plastic.
Asia is the largest producer of plastic in the world. China alone accounted for 32 percent of global production in 2022, producing between six and 12 million metric tons of plastic products each month. North America ranks second worldwide in terms of plastic production, with a share of 17 percent in 2022.
The increase in plastic production has had a significant impact on the environment. When plastic waste is not properly managed—not recycled, incinerated, or kept in sealed landfills—it becomes an environmental pollutant. It is estimated that between one and two million tonnes of plastic enter our oceans yearly, affecting wildlife and ecosystems. This plastic pollution has various negative consequences, including the transmission of vector-borne diseases like malaria by clogging sewers and providing breeding grounds for mosquitoes and pests.
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Mismanaged plastic waste
Plastic pollution is a pressing issue that affects all land, freshwater, and marine ecosystems. It is a major contributor to biodiversity loss, ecosystem degradation, and climate change. Mismanaged plastic waste (MPW) refers to plastic that is not properly recycled, incinerated, or disposed of in sealed landfills. It is a significant contributor to plastic pollution and has severe environmental consequences.
MPW is a global concern, with an estimated 20 million metric tons of plastic litter ending up in the environment annually. This amount is projected to increase significantly by 2040. The accumulation of MPW is disproportionately high in African and Asian countries and tends to be higher in low-to-middle-income regions. Packaging-related plastics have a short in-use phase and often end up as urban litter, contributing to the MPW fraction. Marine litter, which is largely composed of mismanaged plastic packaging and small non-packaging plastic items (PPSI), is a significant issue, with tougher laws and regulations needed to tackle this problem.
The impact of plastic pollution on species and ecosystems is devastating. Wildlife, such as birds, whales, fish, and turtles, mistake plastic waste for food, leading to starvation and internal injuries. Floating plastics also transport invasive alien species, contributing to biodiversity loss and species extinction. The degradation of natural ecosystems, such as mangroves and wetlands, further highlights the urgency of addressing plastic pollution.
To address the growing concern of MPW, it is crucial to target priority areas for mitigation policies. This involves improving waste management, particularly in developing economies, and reducing plastic production globally. Domestic policies and foreign investments in waste management infrastructure are essential to improving waste management practices and reducing plastic pollution. Additionally, a global plastics treaty is needed to phase out harmful subsidies, eliminate harmful products and chemicals, and implement strong national plans and compliance mechanisms.
While some countries, such as Finland, Ireland, Lithuania, Poland, and Slovenia, have made progress in reducing their absolute amounts of mismanaged plastic waste, the overall trend is still concerning. The slow growth in recycling rates and the increase in single-use products exacerbate the problem. To effectively tackle plastic pollution, a comprehensive approach is necessary, combining improved waste management with a focus on waste prevention and stronger responses at local, regional, and global levels.
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Plastic pollution sources
Plastic pollution has become one of the most pressing environmental issues, threatening marine life and ecosystems. The primary sources of plastic pollution are improper disposal and mismanagement of plastic waste. This includes littering, illegal dumping, and inadequate waste management systems, particularly in low-to-middle-income countries. Population centres, such as urban areas, contribute significantly to plastic pollution through littering and stormwater runoff.
The majority of plastic pollution in the ocean is caused by the improper disposal of single-use plastic items, such as food wrappings, plastic bags, bottles, and other disposable plastic products. These items are often not recycled or properly disposed of, ending up in waterways and, eventually, the ocean. Additionally, about 20% of ocean plastic pollution originates from industrial fishing and manufacturing processes.
Land-based sources, including stormwater runoff, industrial activities, tyre abrasion, construction, and agriculture, are significant contributors to plastic pollution. In the marine environment, plastic pollution results primarily from land runoff, paint shed from shipping, discarded fishing gear, and other sources. The breakdown of plastic into microplastics and nanoplastics, due to solar radiation, wind, and currents, further exacerbates the problem.
The production and use of plastic are at their highest levels, with over 450 million tonnes of plastic produced annually. However, recycling rates are low, with only about 10% of plastic being recycled globally. The rest is either incinerated, contributing to air pollution, or ends up in landfills, oceans, and the environment. Improper disposal and mismanagement of plastic waste lead to plastic leakage into ecosystems, with macro-plastics (pieces larger than 0.5 mm) accounting for 88% of global plastic leakage in 2019.
To address plastic pollution, a combination of improved waste management practices, particularly in poorer countries, and a reduction in plastic production and usage is necessary. This includes promoting recycling, phasing out single-use plastics, and implementing effective policies and global treaties to reduce plastic pollution and protect ecosystems.
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Plastic's impact on wildlife
Plastic pollution has a detrimental impact on wildlife, affecting all land, freshwater, and marine ecosystems. It poses a serious threat to various species, from microscopic animals to large predators, and even humans. The ingestion of plastic by wildlife is a significant issue, leading to intestinal blockages and internal injuries. Birds, whales, fish, and turtles often mistake plastic waste for food, resulting in starvation as their stomachs become filled with indigestible material. Plastic ingestion can also pierce internal organs, block digestive tracts, and cause choking. Additionally, it can reduce stomach storage volume, making it difficult for animals to eat.
Plastic debris does not decompose but breaks down into microplastics, tiny particles smaller than 5 mm in size. These microplastics have been found in hundreds of species, including sea turtles, seabirds, and marine mammals. They can pass through the digestive systems of animals without being expelled, leading to liver and cell damage and reproductive issues. Floating plastics can also transport invasive alien species, contributing to biodiversity loss and species extinction.
Entanglement in plastic waste is another critical issue for wildlife. Animals can get trapped, preventing them from hunting for food and making them more vulnerable to predators. This can lead to overheating, suffocation, dehydration, and eventual death. Plastic can also cause deep cuts and wounds, sometimes resulting in the loss of limbs. Birds, in particular, may struggle to fly and hunt due to the presence of plastics.
The impact of plastic pollution on wildlife is not limited to marine environments. Land-based mammals, such as elephants, hyenas, zebras, tigers, camels, and cattle, have also suffered the fatal consequences of plastic ingestion. In one tragic example, a wild elephant in Periyar, India, died due to plastic ingestion from discarded waste, which blocked its intestines and caused internal bleeding and organ failure.
The global production and consumption of plastic have soared in recent decades, and the mismanagement of plastic waste has led to its entry into oceans and ecosystems. It is estimated that 11 million tonnes of land-based plastic waste reach the ocean each year, with a significant amount originating from poorer countries. This plastic pollution affects marine life, with over 800 marine and coastal species impacted by entanglement and ingestion of plastic. As plastic pollution continues to increase, the need for urgent action to address this crisis becomes more critical to protect wildlife and ecosystems.
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Frequently asked questions
Around 450 million tons of plastic are produced annually. This number has been increasing over the years, with a forecast of it tripling by 2060.
Only 9% to 10% of the plastic produced worldwide is recycled. The rest is either burned, buried, or left to pollute the environment.
All land, freshwater, and marine ecosystems are affected by plastic pollution. It impacts wildlife such as birds, fish, dolphins, seals, and other species, causing ingestion, suffocation, and entanglement.
Approximately 11 million tons of plastic enter the ocean annually. This is equivalent to dumping 2,000 garbage trucks of plastic into the world's oceans, rivers, and lakes every day.
