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Characterization and toxicological effects of microplastics in PM2.5 in background sites of the southern coast of China
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Indoor and outdoor atmospheric microplastic deposition was measured at 160 and 241 particles per square meter per day respectively, with black pellets under 80 μm dominating and backward trajectory analysis linking concentrations to wind-driven transport from regional sources. The pervasiveness of airborne microplastics both inside and outside buildings means humans are continuously inhaling particles regardless of behavior, making respiratory exposure a significant and underappreciated health risk.
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