A new study published in Nature Climate Change finds that airborne microplastics absorb more sunlight than they reflect, producing a net warming effect in the atmosphere. Led by researchers at Fudan University, the team tested microplastics of different colors and sizes in the lab and used atmospheric simulations to estimate their climate impact. While the warming is smaller than that from greenhouse gases, the authors say it is large enough to matter for climate calculations.
The researchers report that microplastics-particularly black, yellow, blue and red particles-absorb substantially more sunlight than white particles, and in their models the particles could generate up to about one-sixth of the warming attributed to black carbon (soot). The effect depends on particle color, size and concentration in the atmosphere, all factors the study measured and modeled to assess radiative heating.
“We can say with confidence that overall they are warming agents,” study coauthor Drew Shindell, a professor of earth science at Duke University, told The Washington Post. Shindell also estimated that a year’s worth of heating from microplastic pollution is roughly comparable to the output of about 200 coal-fired power plants running for the same period, a comparison the study’s authors and reporters note does not yet capture the particles’ long-term persistence and decay over decades.
Scientists caution that current climate models do not yet include microplastics and that major uncertainties remain-chiefly how many microplastic particles are present in the atmosphere and how they are distributed horizontally and vertically. “This is not the final word,” Shindell told Scientific American, underscoring the need for more measurements and improved representation in climate assessments.
Separate research has also suggested airborne microplastics can influence cloud formation by providing surfaces for water droplets and ice crystals to form, potentially affecting weather and precipitation. Given their ubiquity-from oceans and soils to human bodies-these findings add a new reason to study microplastics’ environmental and health impacts and to consider their inclusion in future climate modeling and policy discussions.
Original Source: https://futurism.com/science-energy/microplastics-global-warming
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Publish Date: 2026-05-06 01:22:00
