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Risk of microplastic in the global ocean
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Ocean plastic debris persists for thousands of years without biodegrading, fragmenting progressively into microplastics that accumulate in marine food webs and carry adsorbed toxic chemicals across vast oceanic distances. The non-biodegradable persistence of these particles means current pollution levels represent a long-term contamination baseline that will affect marine ecosystems and seafood safety for generations.
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Researchers compiled microplastic data from over 2,000 ocean locations and 200 fish species worldwide, finding that polyethylene and polypropylene are the dominant plastics in both ocean waters and fish gut contents, and outlining strategies — from wetland buffers to wastewater additives — that could reduce how much plastic reaches the sea.
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Researchers reviewed 43 studies across 13 Asian countries and found suspended airborne microplastics ranging from 0.017 to 18,880 particles/m³ outdoors and up to 8,865 particles/m³ indoors, predominantly as fibers and fragments of polyethylene, polypropylene, and PET. The pervasiveness of airborne MPs across Asia—from megacities to ocean environments—demonstrates that inhalation is a significant and underappreciated human exposure route for these persistent pollutants.
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