![]() ![]() The authors acknowledge funding from the National Natural Science Foundation of China. The researchers conclude that more work is needed to fully understand how microplastics affect clouds and the weather. These results suggest that clouds modify microplastics in ways that could enable the particles to affect cloud formation and the fate of airborne metals. Additionally, particles impacted by the cloud-like conditions had more lead, mercury and oxygen-containing groups. In laboratory experiments, the researchers demonstrated that microplastics exposed to cloud-like conditions - ultraviolet light and filtered cloud-sourced water - had smaller sizes and rougher surfaces than those exposed to pure water or air. These models suggested that airflow from highly populated inland areas, rather than from over the ocean or other nearby mountains, served as the major source of the fragments. To investigate where the plastic particles in the clouds originated, Wang and the team developed computer models that approximated how the particles traveled to Mount Tai.
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