Efforts to Reduce Emissions are Crucial for Success of Plastic Pollution Treaty

Representatives from nearly every country will gather in Canada to hammer out the details of a global treaty to tackle rising plastic pollution. One source of disagreement at the summit, which concluded on April 29, was how to address greenhouse gas emissions produced by the production and use of plastics, which are increasingly not recognized as a cause of climate change. was.

“When people think of plastic, they think of something visually visible,” he says. Vermilion Alice At the University of Toronto, Canada. However, the extraction and processing of fossil fuels and other chemicals used to make plastics produces large amounts of greenhouse gas emissions, as does the generation of the energy needed to make plastic products. Plastics currently account for about 10% of total oil and natural gas demand. Coal is also increasing Used to power plastic production.

Incineration of plastic waste is also a source of greenhouse gas emissions. As plastics in the environment degrade, they can emit carbon dioxide and methane. Plastics may even reduce the amount of carbon that ecosystems can store, although the effects have not been well quantified, Zhu said.

The emissions numbers associated with plastic production are more clear-cut.in study Published this month, Nihang Kalari Researchers at Lawrence Berkeley National Laboratory in California estimated that plastic production produced 2.24 billion tons of CO2 in 2019, accounting for about 5% of global greenhouse gas emissions. This is roughly four times the emissions produced by aviation that year.

They found that as plastic production increases, these emissions could triple by 2050, assuming no changes in the way plastics are made. Most of the emissions are related to the extraction and processing of fossil fuels and other chemicals used to make plastics, so decarbonizing the electricity grid will have a small impact on projected emissions. It also became clear that

The global plastics deal currently under discussion could offer a “historic” chance to limit these emissions, the researchers write. In 2022, more than 175 countries have agreed to join a legally binding treaty to tackle plastic pollution throughout the lifecycle of materials, with final details expected to be agreed by the end of this year.

But a group of oil-producing countries, including China and Russia, said during negotiations that the treaty should only address plastic waste through cleaning and recycling, and that production, which is a major source of greenhouse gas emissions from oil, would They argued that it should not be restricted or changed. plastic.country group Including UK and EU argued that the treaty should include provisions to reduce production to keep emissions in line with global climate goals.

“There's a lot on the agenda, but climate certainly isn't talked about much,” he says. neil nathan Professor at the University of California, Santa Barbara, attended the conference to advocate for an ambitious treaty.

according to modeling We've heard from Nathan and others that a strong treaty that takes measures such as limiting production and requiring plastic products to contain a high proportion of recycled content could keep emissions at current levels. Probably. He said the Plastics Treaty would be a “failure” if it did not address production.

Sarah-Jeanne Royer Researchers at the University of California, San Diego suggest that even if the treaty did not reduce greenhouse gas emissions, there would be more sustainable options for making plastics, such as recycled or captured CO2, such as bioplastics or captured CO2. It said the switch would also reduce greenhouse gas emissions by reducing the use of new plastics. Expressly.

but, paul stegman Dutch research institute TNO has warned that plastic alternatives such as steel can generate more emissions, depending on how they are reused and recycled. “Ultimately, we need policies that reduce the impact on society as a whole, not just move the problem elsewhere,” he says.