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https://source.washu.edu/2025/07/sun-exposure-changes-chemical-fate-of-littered-face-masks/
Sun exposure changes chemical fate of littered face masks - The Source - WashU
Sep 8, 2025 - Researchers at Washington University in St. Louis reveal that discarded face masks undergo photochemical changes, influencing their surrounding environment.
sun exposure
https://engineering.washu.edu/news/2025/Sun-exposure-changes-chemical-fate-of-littered-face-masks.html
Sun exposure changes chemical fate of littered face masks | WashU McKelvey School of Engineering
Masks physically degrade into nanoplastics but also chemically change with exposure to sunlight and metals in the surrounding environment.