Omar Khalid
Since 1980, plastics have become increasingly ubiquitous, with global production skyrocketing from 1950 to 2017, when 9.2 billion metric tons of plastic were estimated to have been made. More than half of this amount was produced after 2004, and the plastic industry continues to grow, with Asia emerging as a significant producer since 2010. The history of plastics since 1980 has been characterised by growing awareness of the environmental and health impacts of plastic pollution, particularly in the oceans, and efforts to develop more sustainable alternatives.
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What You'll Learn
Plastic recycling and the development of biodegradable plastics
The recycling symbol, introduced in the 1970s, has been a source of confusion as it does not always indicate that a product is recyclable. This has led to initiatives like California's restriction on the symbol's use to address misleading recycling claims. The complexity of plastic recycling is evident in the variety of plastic types, such as Polyethylene Terephthalate (PET or PETE) and High-Density Polyethylene (HDPE), each with unique properties and recyclability. Despite these challenges, some countries, like the United States, have made significant progress in paper and cardboard recycling, saving trees and positively impacting the environment.
The development of biodegradable plastics has emerged as a critical solution to the plastic waste crisis. Biodegradable plastics, derived from plant crops or fossil fuels, aim to create environmentally friendly alternatives to conventional plastics. The concept of biodegradable plastics was discovered in the 1920s, with accelerated development since the 1970s. Today, biodegradable plastics are widely used in the food industry for packaging materials, bags, and disposable tableware. They are also used in the healthcare industry due to their ability to break down and be excreted from the body.
Polylactic acid (PLA) is one of the most popular biodegradable plastics, offering an alternative to polyester and finding applications in shopping bags, tableware, and electronic appliance parts. While biodegradable plastics show promise, they face challenges such as inferior physical properties and high manufacturing costs compared to conventional plastics. Nevertheless, ongoing research focuses on enhancing their performance, versatility, and sustainability to make them more suitable for a broader range of applications.
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Plastic's reputation and anxiety about waste
Plastic's reputation has changed dramatically since 1980, with the material increasingly associated with waste and environmental concerns. While plastic was initially created to protect and preserve natural resources, by the 1970s and 1980s, it had become clear that the very characteristics that made plastic so useful—its durability and low cost—also contributed to its negative impact on the environment.
Plastic's longevity in the environment, combined with the disposable nature of many plastic products, has led to a significant accumulation of plastic waste. This waste often ends up in landfills, the ocean, and other natural ecosystems, where it can persist for hundreds or even thousands of years without decomposing. The impact of plastic waste on the environment was already a growing concern in the 1970s and 1980s, with activists targeting disposable plastic products and lobbying for recycling initiatives.
The plastics industry responded to these concerns by promoting recycling as a solution. In the late 1980s, the industry began encouraging municipalities to collect and process recyclable materials as part of their waste management systems. However, recycling plastic is not always economically viable, and the process is often imperfect, with much plastic still ending up in the environment. Despite the efforts of the plastics industry and environmental activists, plastic waste continues to be a significant issue. The Great Pacific Garbage Patch, a massive accumulation of plastic waste in the Pacific Ocean, stands as a stark symbol of the ongoing problem of plastic pollution.
In recent years, there has been a renewed focus on addressing plastic waste and improving sustainability. Scientists and innovators are developing bioplastics made from plant crops instead of fossil fuels, as well as working to create truly biodegradable plastics. Efforts are also being made to improve the efficiency of recycling processes and to convert plastic waste into energy and raw materials. These initiatives recognize the important role plastics play in our lives while striving for more sustainable practices and solutions.
While plastic has faced increasing scrutiny due to waste and environmental concerns, it is important to acknowledge the material's positive impacts as well. Plastic has revolutionized manufacturing and played a crucial role in wartime efforts, leading to developments that continue to benefit us today. From medical devices to construction materials, plastic has had a significant influence on various industries and aspects of our daily lives.
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Plastic manufacturing and the role of fossil fuels
Fossil fuels, primarily crude oil, natural gas, and coal, are the main sources of hydrocarbons, which are the building blocks of plastics. The process of extracting these fossil fuels, refining them, and converting them into plastics contributes to climate change and has raised serious concerns. A study by the U.S. federal government estimated that by 2050, plastic production could account for up to 31% of the global carbon emission budget required to limit temperature increases. The connection between plastics and climate change has led to calls for mandatory measures to reduce plastic production and address toxic chemicals in the industry.
In the 1980s, the plastics industry faced increasing scrutiny due to the environmental impact of plastic waste. This led to the industry promoting recycling as a solution, and municipalities began collecting and processing recyclable materials. However, recycling plastic is not always economically viable, and most plastics still end up in landfills or the environment. Despite these challenges, the production and consumption of plastic have continued to grow. Between 1950 and 2017, an estimated 9.2 billion metric tons of plastic were produced, with more than half of that amount made since 2004.
The post-World War II era played a pivotal role in the widespread adoption of plastics. The United States invested heavily in the plastics industry, leading to the establishment of numerous plastic manufacturing companies and refineries for converting crude oil into plastic. Aggressive marketing campaigns targeting women's magazines and promoting plastic home goods further solidified plastic's place in society. Nylon stockings, Tupperware, and vinyl-covered chairs became symbols of modern, suburban life.
While plastic manufacturing has relied heavily on fossil fuels, there is a growing movement towards sustainability and reducing the environmental impact of plastics. Scientists are developing bioplastics made from plant crops, exploring ways to make plastics biodegradable, and improving recycling processes. These efforts recognize the importance of plastics in our lives while striving for more environmentally friendly solutions.
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Plastic's dominance in the 20th and 21st centuries
The 20th and 21st centuries have been dubbed the "Plastics Age", and for good reason. Plastics have become an integral part of our lives, with applications in healthcare, construction, packaging, and manufacturing. However, the dominance of plastics in these centuries has also brought about significant environmental and health concerns.
The story of plastics in the 20th century began with the creation of the first synthetic polymer in 1869 by John Wesley Hyatt, who treated cellulose derived from cotton fibre with camphor to create a mouldable plastic. This discovery was driven by the need to find an alternative to ivory, as elephants were facing extinction due to the demand for their tusks. However, it was during World War II that plastics truly came into their own, with the need for easy-to-produce, durable supplies leading to the creation of new polymers such as polystyrene, polyvinyl chloride (PVC), polyethylene, and nylon. These plastics had a variety of applications during the war, from rope and parachutes to vehicle insulation and uniform coatings.
In the post-war period, plastics manufacturers embarked on a public relations campaign to promote plastic home goods, and they succeeded in making plastic goods sought-after for home decorations and furnishings. The 1950s saw the birth of the modern plastics industry, with global production increasing exponentially. Polyethylene terephthalate (discovered in 1941) and polypropylene (discovered in 1954) became widely used, and the surge in plastic production continued with the advent of polycarbonate and HDPE.
By the 1970s and 1980s, however, the reputation of plastics began to change as concerns about waste and environmental impact grew. Plastic recycling efforts began to emerge, with the plastics industry encouraging municipalities to collect and process recyclable materials. The development of biodegradable plastics also began to flourish during this time. Despite these efforts, the problem of plastic waste has persisted, with plastic pollution in the oceans becoming a significant global concern.
In the 21st century, the dominance of plastics has continued, with plastic products pervading all aspects of society. However, there is a growing recognition of the need for more sustainable practices. Scientists and innovators are working on creating bioplastics from plant crops, improving recycling processes, and developing truly biodegradable plastics. As we move forward, the challenge will be to balance the benefits of plastics with the need to protect the environment and human health.
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Plastic waste and environmental concerns
Plastic waste has become one of the most pressing environmental issues, with rapidly increasing production of disposable plastic products overwhelming the world's ability to deal with them. Plastic waste has contaminated ecosystems and impaired their ability to adapt to climate change, directly affecting millions of people's livelihoods, food production capabilities, and social well-being.
The plastic industry has been criticised for lobbying for the expansion of recycling programmes, even though most plastic cannot be economically recycled. The low recycling rates of plastic are due to economic and technical challenges. Recycling is not a perfect solution, and most plastics still end up in landfills or the environment. The ultimate symbol of the problem of plastic waste is the Great Pacific Garbage Patch, a swirl of plastic garbage the size of Texas floating in the Pacific Ocean.
The environmental concerns associated with plastic waste are due to its slow decomposition rate in natural ecosystems, allowing it to persist in the environment for hundreds of years. Plastic can degrade into microplastics, which are spread through air, water, and soil, impacting both terrestrial and aquatic animals through ingestion, entanglement, and other means. Microplastics have been detected in municipal drinking water systems and the air we breathe, and they have even been found inside human bodies. The health risks posed by microplastics are a subject of urgent scientific investigation.
To address plastic waste and its environmental impacts, various international, regional, and national-level legislations, policies, and concepts have been proposed, such as the 3R policy and the circular economy. Some scientists are working to make plastics more sustainable, developing bioplastics made from plant crops and truly biodegradable materials. Others are striving to improve recycling processes, aiming to convert plastics back into fossil fuels or feedstocks for new plastic fabrication. While plastic has valuable applications, addressing its waste and environmental concerns is crucial for a sustainable future.
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Frequently asked questions
In the 1970s and 1980s, plastic's reputation fell as anxiety about waste increased. The public became aware of the environmental impact of plastic waste, and the plastics industry responded by promoting recycling as a solution. However, despite the push for recycling, most plastics still end up in landfills or the environment. Today, plastic is recognised as one of the worst polluters, and there is a growing movement to reduce, reuse, and recycle plastic waste effectively.
Plastic production has increased exponentially since the 1950s, with more than half of the total plastic produced since 1950 being made since 2004. In the 1980s, the annual global production of plastic was around 100 million metric tons, while in 2021, it reached 400 million tons. Asia, particularly China, has emerged as a significant producer since 2010, and the industry continues to grow due to increasing global demand.
Since the 1980s, there has been a growing focus on developing more sustainable and biodegradable plastics. Bioplastics, made from plant crops instead of fossil fuels, and truly biodegradable plastics are being explored. Researchers are also working on improving the recycling process, aiming to convert plastics back into fossil fuels. Additionally, there is a shift towards monetising "orphan plastic" and employing individuals to collect and process waste, creating economic opportunities and cleaner communities.
