Airborne Microplastics Contribute to Global Warming, Study Finds

New Link Between Plastic and Climate

Airborne microplastics and nanoplastics are contributing to the heating of the Earth's atmosphere, according to a new study published in the journal Nature. While previous research into microplastics has primarily focused on their impact on human health and the environment, this new data reveals a previously overlooked connection between plastic pollution and global climate change.

Scientists from the United States and China conducted the research, examining the makeup and behavior of these particles as they move through the atmosphere worldwide. The study indicates that minuscule pieces of plastic, particularly those of various colors, are active contributors to atmospheric heating.

Mechanisms of Atmospheric Heating

The study found that these particles interact with sunlight to influence the climate system. Specifically, researchers determined that airborne microplastics trap nearly one-fifth as much heat as black carbon, a known potent climate-warming agent.

Microplastics have become ubiquitous in the global environment, infiltrating rivers, lakes, agricultural soil, and the oceans. They have also been detected in cleaning products, cosmetics, food, water, and within human bodies. The presence of these particles in the air allows them to act as a mechanism for heat retention in the atmosphere.

Scientific Perspective

Hongbo Fu, an atmospheric scientist at Fudan University in Shanghai and an author of the study, stated that the report "reveals a long overlooked link between plastic pollution and climate change".

Other research into the release of these particles suggests that the design and shape of plastic packaging, as well as the conditions under which it is kept—such as exposure to heat or UV light—can affect the release of microplastics and nanoplastics into the environment.