Microplastics May Worsen Climate Change by Disrupting Carbon Storage, Scientists Warn

While plastic production already accounts for about 5% of global greenhouse gas emissions, new research suggests its climate impact may be even greater than currently estimated. A report from the Plastics & Climate Project reveals that microplastics may interfere with key natural systems that store carbon, such as oceans and soils—an effect not yet reflected in most climate models. In the ocean, microplastics disrupt marine snow and plankton behavior, which are crucial for carbon sequestration. On land, they may alter microbial activity that helps lock carbon in soil. Researchers also warn that plastics might affect Earth’s reflectivity—changing how sunlight interacts with snow, ice, and clouds—and release methane as they degrade. These findings point to an overlooked threat: plastic pollution may be weakening the planet’s natural defenses against global warming. Scientists stress the need for urgent research and policy action to fully account for plastic’s hidden role in accelerating climate change.

22-05-2025