Brian Barton
Plastic pollution is a pressing global issue. The world produces about 300-350 million tonnes of plastic waste annually, with a staggering 8 million tonnes ending up in the oceans each year. This plastic pollution has devastating consequences for marine life, killing over 100,000 marine animals and more than 1 million seabirds annually. It also poses risks to human health, with microplastics found in drinking water systems, the air we breathe, and even our own bodies. While some efforts have been made to reduce plastic usage and improve waste management, it is clear that much more needs to be done to address this crisis.
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What You'll Learn
Plastic waste in oceans
Plastic pollution in oceans originates from various sources worldwide, with rivers being a significant conduit. The Yangtze River in China, for example, releases approximately 1.5 million tons of plastic waste into the Yellow Sea. Rivers act as conveyer belts, picking up trash as they flow downstream, and carrying it into the ocean. Once in the ocean, plastic waste is transported by ocean currents, spreading plastic pollution globally.
The impact of plastic waste in oceans is devastating for marine life. Marine animals, such as seabirds, sea turtles, seals, whales, and fish, ingest plastic particles or become entangled in plastic debris, leading to injury and mortality. Plastic waste also provides breeding grounds for mosquitoes and pests, increasing the transmission of vector-borne diseases like malaria.
The accumulation of plastic in oceans is a result of improper waste management and the widespread use of single-use plastics. While high-income countries have effective waste management systems, middle- and low-income countries often lack adequate infrastructure, leading to higher emissions of plastic waste into the ocean. To address this issue, domestic policies and foreign investments in waste management infrastructure are crucial.
Additionally, reducing the use of disposable plastic is essential. Many governments have adopted policies to ban or restrict the use of single-use plastic items, such as plastic bags and straws. Public awareness campaigns, incentives for recycling, and product design changes can also play a significant role in mitigating plastic waste in oceans. By addressing the root causes and implementing effective solutions, we can work towards reducing the devastating impact of plastic pollution on our oceans and marine ecosystems.
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Mismanaged waste
The world produces around 300 to 350 million tonnes of plastic waste each year. The amount of plastic mismanaged waste varies across the world but tends to be much higher in low-to-middle-income countries. Mismanaged waste refers to plastic that is not recycled, incinerated, or kept in sealed landfills. It is at risk of being leaked into rivers, lakes, and oceans.
A 2017 study estimated that Asian countries contributed 86% of plastic emissions to the ocean. China's Chang Jiang (Yangtze) River, for example, delivers nearly 1.5 million tons of plastic waste into the Yellow Sea. It is worth noting that plastic waste in rivers is not limited to developing countries. For instance, the Thames River in London has one of the highest microplastic concentrations in the world.
Around the world, only 9% of all plastic waste ever produced has been recycled, with another 12% incinerated. The remaining 79% has accumulated in landfills, dumps, or the natural environment. The low rate of recycling is partly due to the fact that plastic is technically a sustainable material, making it far cheaper to produce new products from scratch than to recycle. However, this does not account for the environmental cost of producing new plastic, which is significant.
To reduce plastic pollution, many scientists and conservationists advocate for improved waste management systems and recycling, better product design, and a reduction in manufacturing single-use plastics. Some countries have already taken steps to reduce the use of disposable plastic, with Africa standing out as the continent where the most countries have adopted a total ban on the production and use of plastic bags.
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Plastic production growth
Plastic production has sharply increased over the last 70 years. In 1950, the world produced just two million tonnes. By 2019, the world was producing 460 million tonnes of plastic annually, with this figure surpassing 400 million metric tons in 2022. This represents an almost 230-fold increase in production since 1950, with global plastic production doubling in the last two decades alone.
The growth in plastic production can be largely attributed to the availability of cheap shale gas and growing investments from the fossil industries. Indeed, 99% of plastics are created from chemicals of fossil origin, with more than 99% of plastics produced from chemicals derived from oil, natural gas, and coal. As a result, the plastic industry is closely linked to the petrochemical industry, and petrochemicals are expected to be the largest driver of global oil demand growth from now until 2040.
The rate of plastic production has grown faster than that of any other material since the 1950s. This growth has been driven by the development of thousands of new plastic products, particularly single-use plastics, which now account for 40% of the plastic produced annually. The shift towards single-use plastics has contributed to the plastic pollution crisis, as these plastics are designed to be thrown away after one use.
China is a major contributor to global plastic production, with the country producing between six and 12 million metric tons of plastic products each month. North America ranks second in terms of plastic production, with a 17% share in 2022.
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Plastic recycling
Plastic pollution is a pressing issue, with around 350 million tonnes of plastic waste produced each year. Only about 9% of all plastic waste has ever been recycled, with the rest accumulating in landfills, dumps, incineration, or the natural environment. Plastic recycling is the processing of plastic waste into other products. It can reduce dependence on landfills, conserve resources, and protect the environment from plastic pollution and greenhouse gas emissions. While recycling is important, reduction and reuse are more favourable long-term solutions for sustainability.
The plastic recycling process can be broken down into six steps: collection, sorting, washing, shredding, melting, and moulding. Collectors from the government or private companies gather all post-consumer plastic waste from various sources. Sorting is done by colour, thickness, usage, and polymer type, either manually or by machines at recycling plants. After sorting, the plastic is washed to remove impurities such as labels, adhesives, and food residue. The plastic is then shredded into smaller pieces, which can be sold as a raw material or used as additives. Next, the shredded plastic is melted and, finally, moulded into new products.
While plastic recycling has improved in recent years, there are still challenges. Many products are made from a combination of plastics or mixed materials, which cannot be processed in most recycling facilities. Additionally, recycling different types of plastics can be complex and technically challenging. Efforts to improve recycling methods include technological advancements, growing awareness, and initiatives by communities, businesses, and governments.
To reduce plastic pollution, it is crucial to prevent plastics from entering waterways through improved waste management systems, better product design, and a reduction in manufacturing single-use plastics. Domestic policies and foreign investments in waste management infrastructure can also play a significant role in addressing the issue. Public awareness campaigns, incentives for recycling, and banning or taxing certain plastic products are other strategies to combat plastic pollution.
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Plastic pollution solutions
The world produces around 300 to 350 million tonnes of plastic waste each year. Between 1 and 2 million tonnes of plastic enter the oceans annually, and plastic pollution in the oceans is essentially irreversible, with plastic taking hundreds of years to fully degrade.
Improved waste management
The first step to tackling plastic pollution is to prevent plastics from entering waterways via improved waste management systems. This includes ensuring that plastic waste is recycled, incinerated, or kept in sealed landfills. Domestic policies and foreign investments in waste management infrastructure can help improve waste management practices.
Reduce single-use plastics
The production of single-use plastics has accelerated in recent decades, with single-use plastics now accounting for 40% of the plastic produced annually. To reduce plastic pollution, it is essential to reduce the manufacturing and use of single-use plastics. Individuals can embrace plastic-free principles in their daily lives, such as carrying a reusable water bottle and avoiding plastic straws. Governments can also play a role by banning single-use plastic products.
Better product design
Businesses should focus on improving product design to reduce plastic pollution. This includes avoiding the use of plastic in products whenever possible and ensuring that any plastic used is recyclable. The perpetuation of recycling as a solution by the plastic industry is an example of "greenwashing," which delays and distracts from real solutions. Instead, businesses should implement regenerative strategies and shift to sustainable practices.
Public awareness and education
Governments can play a role in raising public awareness about the impacts of plastic pollution and educating individuals on how to reduce their plastic consumption and properly dispose of plastic waste. This can include offering incentives for recycling and providing resources to help individuals make more sustainable choices.
Global collaboration
Plastic pollution is a global issue that requires collaboration across countries and communities. Low-to-middle-income countries tend to have higher rates of mismanaged plastic waste, and richer countries can contribute by investing in waste management infrastructure in these regions. Additionally, listening to the voices of frontline communities disproportionately harmed by plastic pollution is essential to developing effective solutions.
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Frequently asked questions
The world produces around 300 to 350 million tonnes of plastic waste each year.
It is estimated that between 1 and 2 million tonnes of plastic enter the oceans annually. That amounts to five grocery bags filled with plastic for every 1 foot of coastline on earth.
While plastic is technically a sustainable material, only 8 to 9% of all plastic waste is recycled. The majority of plastic is never recycled.
Most of the plastic pollution in the oceans comes from land. Trash is carried to the sea by major rivers, which act as conveyor belts, picking up more and more trash as they move downstream.
