Maya Ellison
Plastic is everywhere, from the buttons on our shirts to the packaging of our food. Since the plastic revolution, 6.3 billion tonnes of plastic waste have been produced worldwide, with 79% of it ending up in landfills and the rest polluting our oceans, forests, and soils. This has led to growing concerns about the impact of plastic on human health and the environment. So, what is the future of plastic? While some advocate for reducing, reusing, and recycling plastic, others propose replacing conventional plastics with biodegradable polymers or bioplastics. Achieving a circular plastic economy will require not only changes in consumer behaviour but also collaboration across industries and academia. The future of plastic is about finding a balance between its usefulness and sustainability.
| Characteristics | Values |
|---|---|
| Plastic waste produced worldwide | 6.3 billion tonnes |
| Percentage of plastic waste stored in landfills | 79% |
| Plastic waste entering oceans via rivers every year | 2.41 million tonnes |
| Plastic waste in the oceans | Great Pacific Garbage Patch, the size of Texas |
| Plastic waste in the environment | Hundreds of years |
| Degraded plastic waste | Microplastics |
| Approach to combat escalating plastic waste | Reduce, Reuse, Recycle |
| Plastic future | Biodegradable polymers |
| Biodegradable polymers | CO2, CH4, H2O |
| Bioplastics | Part of the solution |
| Bioplastics | Bio-based, Biodegradable, or Both |
| Bioplastics | Sustainable, Biodegradable, Recyclable |
| Plastic use in 2020 | 464 Mt |
| Projected plastic use in 2050 | 884 Mt |
| Plastic use in packaging sector in 2050 | 27.3% decrease with reduction targets |
| Plastic use in packaging sector in 2050 | 75% recyclable with recycling targets |
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What You'll Learn
Biodegradable polymers
The development of biodegradable polymers has evolved significantly over the years, marked by technological advancements and research breakthroughs. Early biodegradable polymers faced challenges such as limited durability and high production costs. However, ongoing innovation has led to the emergence of advanced bioplastics with improved properties and performance. Examples of biodegradable polymers include Polylactic Acid (PLA), derived from renewable resources like corn starch or sugarcane, and Polyhydroxyalkanoates (PHA), produced by microbial fermentation of renewable feedstocks.
The future of plastics lies in a circular economy, where biodegradable polymers replace conventional plastics. This will require collaboration between industry and academia, as well as different disciplines such as chemistry, engineering, materials science, biogeochemistry, and climate science. With proactive policies and continued research, the world can move towards a greener and more sustainable future with biodegradable polymers.
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Bioplastics
In the 1990s, Cargill Inc. further researched bioplastics and, in 2000, collaborated with Dow Chemical Company to manufacture polylactic acid (PLA) plastics from corn. Today, bioplastics are mainly made from carbohydrate-rich plants such as corn, sugar cane, or sugar beet. They can be recycled and help reduce a product's carbon footprint.
Despite their higher price and insufficient supply, bioplastics are becoming more popular. At the moment, they make up about 1% of the total plastic market, but this percentage is expected to grow quickly. The European Union is even legislating to promote the use of biodegradable plastics and limit the use of traditional fossil fuel plastics. Bioplastics are one of the materials of the future, with the potential to reduce our dependence on fossil resources and provide a climate-neutral alternative to traditional plastics.
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Reduce, reuse, recycle
Plastic has transformed our lives in many positive ways, but it has some serious environmental flaws in both its production and disposal. Since the plastic revolution, 6.3 billion tonnes of plastic waste have been produced worldwide, with 79% of it stored in landfills. This has resulted in up to 2.41 million tonnes of plastic waste entering our oceans annually, choking marine life and propagating up the food chain in the form of microplastics.
To address this escalating plastic waste problem, the approach of "reduce, reuse, recycle" has been widely advocated. Reducing plastic waste can be achieved through proactive policies and individual behavioural changes. For example, consumers can opt for reusable water bottles and bags, purchase second-hand goods, and support environmentally-friendly brands that use recycled materials.
Reusing plastic items is another crucial aspect. Instead of discarding plastic items after a single use, they can be used multiple times or repurposed for different functions. This extends the lifespan of plastic products and reduces the need for new plastic production.
Recycling is the third component of the approach. While recycling has faced challenges due to cost, human behavioural factors, and the production of lower-quality materials, advancements in molecular-level recycling now allow different plastics to be recycled together. Achieving broader sustainability goals also requires the full implementation of recycling initiatives and the development of biodegradable polymers to replace conventional plastics.
The dream is to create a circular plastic economy where products are 100% recyclable, used for extended periods, and their waste is minimised. This will require collaboration between industries, academia, and various scientific disciplines to develop and implement innovative solutions. While bioplastics offer a promising alternative, they are only part of the solution, and a fundamental change in human behaviour and consumption patterns is also necessary to combat the plastic waste crisis.
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Plastic's environmental impact
Plastic is a highly useful and convenient material with a valuable place in our lives. It is used in almost every industry in the world, from food packaging to space exploration, and has brought about societal benefits and technological and medical advances. However, the environmental impact of plastic is undeniable.
Plastic is a major source of pollution, with excessive production, indiscriminate consumption, and improper disposal leading to hazardous environmental effects. Plastic waste accumulates in landfills, natural habitats, and oceans, where it persists indefinitely, causing physical problems for wildlife through ingestion or entanglement. In the 2010s, about 80% of plastic waste ended up in landfills, was burned, or leaked into the environment instead of being properly managed. Moreover, the production and usage of plastic release significant carbon dioxide emissions, contributing to climate change.
The chemical composition of plastics also poses risks to the environment and human health. Chemicals can leach out of plastic products, potentially transferring to wildlife and humans through ingestion or contact. Endocrine-disrupting chemicals in plastics have been linked to adverse health effects, and the complex nature of the endocrine system necessitates further research on the impacts of chemical mixtures found in common household products.
Addressing the environmental impact of plastics requires a multifaceted approach. This includes reducing plastic consumption, reusing and recycling plastics, and transitioning to biodegradable polymers and bioplastics derived from plant crops instead of fossil fuels. Improving recycling technologies and implementing regulatory measures, such as extended producer responsibility schemes, can also help mitigate plastic waste. Additionally, proactive policies and international cooperation are crucial for achieving broader sustainability goals related to energy production and virgin plastic reduction.
While a future without plastic seems unlikely, innovators are working to make plastics safer and more sustainable. By recognising the importance of plastics and addressing their environmental challenges, we can strive for a sustainable future where plastics play a responsible role in our lives.
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Plastic manufacturing alternatives
Plastic is a highly useful material that has transformed our lives in many positive ways. However, it has some serious environmental flaws in both its production and disposal. The durability of plastic, one of its greatest assets, is now a curse, as it stays in our environment for hundreds of years, choking marine life and entering the food chain.
To address the plastic waste problem, the "reduce, reuse and recycle" approach has been widely promoted. However, this strategy has had limited success due to the challenges of changing human behaviour and the limitations of recycling, such as high costs and lower-quality outputs. As a result, there is a growing recognition that a fundamental shift is needed in plastic manufacturing.
One promising alternative to conventional plastics is biodegradable polymers, which can break down into smaller molecules like CO2, CH4, and H2O, through the action of microorganisms. Biodegradable polymers can be derived from plants, animals, microorganisms, or synthetic processes. This shift towards biodegradable materials has the potential to create a circular plastic economy where products are fully recyclable, used for extended periods, and their waste is minimised.
In addition to biodegradable polymers, bioplastics also offer a partial solution to the plastic problem. Bioplastics are bio-based, biodegradable, or both, and can be made from a range of materials, including petroleum-based plastics, plant-based sources, or a combination of both. While bioplastics are not a complete solution, they can help reduce the environmental impact of plastic production and disposal when combined with changes in consumer behaviour, such as reducing, reusing, and recycling.
Furthermore, proactive policies and interventions can play a significant role in mitigating sustainability challenges. For example, implementing reduction targets in the packaging sector can lead to substantial decreases in plastic use, as can achieving recycling targets. These interventions, combined with the development and adoption of alternative materials, can help create a more sustainable future for plastics.
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Frequently asked questions
The future of plastics is likely to be biodegradable polymers that can break down into smaller molecules such as CO2, CH4 and H2O. These polymers can be produced from plants, animals, or microorganisms, and can also be synthetic.
Conventional plastics are manufactured using petroleum, coal, or gas, which are non-renewable resources. The durability of plastic is now a curse as it stays in our environment for hundreds of years, causing hazardous environmental effects.
Reduce, reuse, and recycle plastic products. Individuals can use reusable water bottles and bags, buy second-hand, and choose environmentally friendly brands. Governments and manufacturers can set targets for reduction and implement recycling initiatives.
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