Microplastics Don’t Just Pollute. They’re Also Heating the Planet.
For years, scientists have focused on the environmental and health impacts of microplastics. Now, researchers are beginning to understand that these particles are also influencing the climate itself.
A New Role for Microplastics
Microplastics are tiny plastic particles, often smaller than a grain of sand, that come from sources like clothing, packaging, tires, and everyday consumer products. They have already been detected in our water, food, air, and even inside the human body. This new research adds another concern to the growing list: microplastics do not just exist in the environment; they actively interact with sunlight and contribute to global warming.
According to a new study in Nature Climate Change, airborne microplastics can absorb solar radiation, meaning they trap heat in the atmosphere rather than reflecting it away. Researchers found that black and colored microplastics absorb significantly more heat than lighter or transparent plastics. As these particles absorb and retain heat, they warm the surrounding atmosphere and contribute to rising global temperatures. This adds to the broader climate crisis, contributing to issues such as rising sea levels, severe weather events, and disruptions to ecosystems and food systems.
Small Particles, Big Impact
Microplastics may be microscopic, but their presence is widespread. These particles travel through the air, oceans, rivers, and soil, creating a persistent form of pollution in every corner of the world.
The study found that microplastics contribute to atmospheric warming at about 16.2% of the level of black carbon, or soot, with higher levels seen over oceanic garbage patches. Unlike many pollutants that naturally degrade over time, microplastics are extremely persistent. They can remain in the environment for decades, meaning their climate impact may continue growing long into the future.
A Missing Piece in Climate Models
Because this area of research is still relatively new, most current climate models do not account for the warming effects of microplastics. That means scientists may be underestimating the full impact of plastic pollution and the true scale of climate change.
This study is among the first to quantify how airborne microplastics influence the Earth’s energy balance, the equilibrium between incoming and outgoing energy in Earth’s atmosphere, highlighting an important gap in our understanding of climate change and the long-term consequences of microplastic pollution.
What You Can Do
This research adds to the growing body of evidence showing that microplastic pollution is not just an environmental issue. Alongside concerns about human exposure and ecosystem damage, microplastics are also contributing to climate change itself.
Reducing microplastic pollution starts with everyday decisions. Choosing products with less plastic packaging, reducing unnecessary plastic waste, and supporting long-term sustainability solutions can all help limit microplastics entering the environment.
The Largest Source of Microplastic Pollution: Laundry
One of the biggest sources of microplastic pollution is laundry. Every time clothing is washed, tiny fibers break off and enter wastewater systems. Many of these particles are too small to be fully captured through traditional wastewater treatment, allowing them to flow into rivers, lakes, and oceans.
CLEANR helps stop this pollution at the source. The CLEANR Microplastic Filter captures over 90% of microfibers released during washing before they can enter the environment. By filtering microplastics directly from your laundry, you can help protect waterways, ecosystems, and the future of our climate.