Alexei Volkov
Plastic is an integral part of our daily lives, with over 8.3 trillion kilograms of plastic produced since 1950. However, the plastic waste generated by human activity is causing significant harm to our environment and marine ecosystems. Plastic waste travels through various channels, from household disposal to recycling centers and
| Characteristics | Values |
|---|---|
| Plastic's journey | From household disposal to recycling centers and landfills, plastic waste travels through various channels. |
| Plastic's final destination | Landfills, the ocean, incineration facilities, and recycling centers are some of the most common destinations for plastic waste. |
| Challenges with recycling plastic | Plastic recycling is often unprofitable and inefficient, with less than 10% of all discarded plastic ever undergoing the recycling process. |
| Impact of plastic waste | Plastic waste can escape landfills, especially in areas with poor waste management, and contaminate the environment, including oceans and marine ecosystems. |
| Global plastic waste trade | A multi-billion dollar industry, the global plastic waste trade involves the movement of plastic waste across continents, often ending up in poorer nations. |
| Plastic decomposition | Plastic can take 400 to 1,000 years to fully decompose, with most plastic used in our lifetimes still existing somewhere on the planet. |
| Microplastics | Plastic breaks down into tiny pieces called microplastics, which can enter the marine food chain and have been found in rain in remote mountainous regions. |
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What You'll Learn
The plastic recycling business
Plastic is an integral part of our daily lives, with 8.3 trillion kilograms of plastic produced from 1950 to 2017. However, plastic waste is a significant environmental concern, with improper disposal leading to plastic pollution in oceans, landfills, and natural ecosystems. The plastic recycling business plays a critical role in addressing this issue by reducing, reusing, and recycling plastic waste.
The sorted plastic waste then travels to recycling facilities, where it undergoes further processing. At these facilities, plastic waste is transformed into recycled feedstock or raw materials for new products. Recycling technologies vary, with some companies specialising in recycling hard-to-recycle plastics or integrating recycled content into new products. For example, TerraCycle, a waste management company, offers solutions to recycle unique materials like beach plastic and festival waste, partnering with brands to incorporate recycled content into their packaging.
The Association of Plastic Recyclers (APR) is another key organisation in the plastic recycling business. APR provides design guidance, recyclability specifications, and policy education to companies in the plastics industry. Their expertise ensures that plastic packaging is designed with sustainability in mind and guides companies towards more recyclable products. APR also offers certification programs, like the Post-Consumer Resin (PCR) Certification, which helps companies meet legislative requirements and promotes standardisation in the supply chain.
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How plastic reaches the oceans
Plastic has been an integral part of our daily lives, with the world producing 8.3 trillion kilograms of plastic from 1950 to 2017. However, the mismanagement of plastic waste, including improper disposal, recycling, and storage, has led to significant environmental concerns, especially in our oceans.
The main source of ocean plastic pollution is land-based, with 80% of plastic in the ocean originating on land. Plastic waste can be carried by rainwater and wind into streams, rivers, and drains, eventually making its way to the ocean. This is particularly prevalent in coastal cities in middle-income countries, where the proximity to rivers and oceans increases the likelihood of plastic reaching the ocean. Improper waste disposal, including illegal dumping and littering, also contributes to the plastic surge in our seas.
Another way plastic reaches the ocean is through household disposal and recycling centers. When rubbish is transported to landfills, plastic can easily be blown away due to its lightweight nature. This is exacerbated in cities with poor waste management practices, leading to plastic escaping the dumping site. Even well-managed landfills pose threats, as the decomposition of plastic can form a highly toxic liquid called leachate, which can leak into the environment and contaminate soil and groundwater.
Additionally, microplastics, such as synthetic fibres from clothing, can enter waterways when we wash our clothes and are small enough to pass through wastewater treatment plants. These microplastics are consumed by small marine species and can eventually enter our food chain. While only about 0.5% to 1% of plastic waste ends up in the ocean, the impact is significant, with plastic accumulating in subtropical oceanic areas called gyres, trapping floating plastic for decades or even centuries.
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Plastic waste in landfills
Plastic is challenging to degrade, persisting in the environment for decades or even centuries. As plastic waste degrades, it breaks down into smaller particles, including microplastics, which can be transported by air and leachate to surrounding environments. Landfills serve as a critical source of microplastic pollution, with studies showing that landfill depth and plastic morphology significantly impact the distribution of microplastics. The formation and spread of microplastics from landfills contribute to increasing pollution of land and sea, posing risks to both the environment and human health.
The degradation of plastic waste in landfills can also lead to the release of harmful substances. Volatile organic compounds (VOCs) are released through oxidative photodegradation, posing risks to the environment and human health. In addition, the open burning of plastic waste, a common practice in regions with inadequate waste management infrastructure, can release toxic emissions.
To address these issues, improved waste management practices and policies are urgently needed. Microbial degradation presents a promising alternative for managing plastic waste. Certain microorganisms and enzymes can degrade synthetic plastics, offering a biological treatment technology. However, the best option is to limit plastic use through substitution, reuse, separate collection, and recycling. While controlled landfills can be a good option for disposing of plastic waste, the primary concern is ensuring proper landfill construction and management to prevent environmental harm.
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Plastic waste in incineration facilities
Plastic waste is sent to incineration facilities, also known as waste-to-energy (WTE) facilities, where it is burned to generate electricity. While incineration reduces the volume of waste sent to landfills, it is not a sustainable solution due to the environmental and health impacts associated with the process.
Incineration facilities burn mixed municipal solid waste, which includes plastic waste. The resulting heat is used to generate electricity. However, the incineration process also produces carbon dioxide emissions, air pollutants, fly ash, and other solid waste residues. Additionally, the burning of plastic waste can release harmful dioxins into the environment if the incinerators are inefficient.
In the United States, there has been a decline in the number of municipal solid waste incinerators due to insufficient revenue and environmental concerns. It is estimated that the U.S. recycled only about 2% of municipal plastic waste domestically in 2018, while burning more than six times that amount. This ratio may be even higher, as cities are reluctant to publicize the incineration of plastic waste instead of recycling it.
The incineration of plastic waste is controversial. While some argue that it is better to recover energy from non-recyclable waste through incineration than send it to landfills, others emphasize the negative impacts of incineration on the environment and public health. The production of toxic ash containing heavy metals, the release of harmful emissions, and the low energy efficiency of incinerators are significant concerns.
Furthermore, incineration incentivizes and relies upon the continued production of waste, including plastic waste. Incinerators depend on energy-dense materials like plastic to maintain high burn temperatures. This leads to a dependence on the continuous generation of waste, which is not a sustainable long-term solution.
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Plastic waste in the natural environment
Plastic waste has become a pressing environmental issue, with the overwhelming rise in the production of disposable plastic products. Plastic commercialisation began during World War II and has grown exponentially since, with the global annual production of plastic now exceeding 359 million tons. Half of all plastics ever manufactured have been made in the last 20 years, and production is expected to double by 2050.
The plastic waste generated travels through various channels, from household disposal to recycling centres and landfills. About 50% of plastic waste ends up in landfills, where it can escape the dumping site, especially in areas with poor waste management practices. Landfills also pose a threat to the ecosystem during the decomposition process, as a highly toxic liquid called leachate is formed, which can contaminate the soil and groundwater.
The remaining plastic waste often ends up in oceans, rivers, and lakes, with an estimated eight million metric tons of land-based plastic entering the world's oceans each year. This plastic waste can be carried by ocean currents, such as the South Pacific gyre, to even the most remote locations, like Henderson Island, an uninhabited atoll between Chile and New Zealand. Once in the ocean, plastic breaks down into microplastics, which are virtually impossible to recover. These microplastics have been found in every corner of the globe, including Mount Everest and the Mariana Trench, as well as in municipal drinking water systems and the air.
The impact of plastic pollution on the environment is significant, altering habitats and natural processes and reducing ecosystems' ability to adapt to climate change. It also poses risks to human health, with microplastics contributing to cardiovascular diseases, chronic kidney disease, birth defects, and cancer.
While completely cleaning up plastic pollution in the environment may be impossible, prevention and reduction are crucial. This includes improving waste management systems, recycling, product design, and reducing the manufacturing of single-use plastics.
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Frequently asked questions
Plastic garbage ends up in landfills, dumps, the natural environment, and the ocean.
Plastic enters the ocean through rivers, which serve as direct conduits of trash from cities to the marine environment. It is estimated that 8 million metric tons of land-based plastic enter the world's oceans each year.
Plastic can take 400 to 1,000 years to fully decompose, breaking down into microplastics that can enter the marine food chain and harm sea life.
Individuals can reduce plastic pollution by cutting down on single-use plastics, recycling when possible, and supporting policies and organizations that aim to reduce plastic waste and clean up the environment.
