A new study from Tsinghua University highlights a major environmental crisis: global plastic recycling has stagnated despite a surge in plastic production. Published in Communications Earth & Environment, the research coincides with renewed international negotiations to establish a treaty targeting plastic pollution, following a failed previous round of talks.
The study underscores the severity of plastic waste, which has been found in remote ocean depths, mountain snow, human blood, and breast milk. Despite the increasing visibility of plastic’s impact, the researchers argue that there has been a significant lack of comprehensive analysis covering the entire plastics supply chain. To address this gap, the team conducted the first global evaluation of the plastics sector for 2022, drawing on national statistics, industry reports, and international databases.
Their findings are sobering: only 9.5% of the 400 million tonnes of plastic produced in 2022 came from recycled sources. The remainder was manufactured from fossil fuels, mainly oil and gas, reinforcing the industry’s heavy carbon footprint. The report warns that this ongoing dependence on virgin plastic will hinder global efforts to mitigate climate change.
A key insight from the research is that global plastic recycling remains hampered by several persistent barriers. Physical contamination—such as food residue and labels—makes many plastics hard to process. Additionally, the chemical complexity of plastic additives further complicates recycling. Most notably, the economics of recycling are stacked against progress: producing new plastic is often cheaper than recycling existing materials. This cost disparity deters investment in recycling infrastructure and perpetuates low recycling rates.
The United States, the world’s largest per capita plastic consumer, was singled out for its particularly low performance, with only 5% of plastic being reused. Meanwhile, waste disposal practices are shifting. Although landfilling still accounts for about 40% of global plastic waste, incineration is on the rise—now handling around a third of the total. Countries such as China, Japan, and members of the European Union are leading in plastic incineration, a trend the authors say could further complicate sustainability goals.
However, the study acknowledges that its recycling estimates may be incomplete, as they don’t fully incorporate informal recycling networks, especially prevalent in low-income regions. These unregulated systems, while filling gaps in official infrastructure, often involve open burning of plastics—a practice linked to air pollution and human health risks, as highlighted by a separate Nature study from the University of Leeds.
Ultimately, the researchers hope their findings will inform upcoming treaty negotiations in Geneva and stimulate urgent action to tackle the shortcomings of global plastic recycling. They emphasize that without comprehensive strategies and international cooperation, the world will continue to fall short in confronting the challenges of global plastic recycling.