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Things we know and don’t know about nanoplastic in the environment
Summary
Researchers outlined the key unanswered questions about nanoplastics — plastic fragments smaller than 1 micrometer — including how they form, how they behave in the environment, and what risks they pose to living organisms. Because nanoplastics are far smaller than most detected microplastics, they may more easily penetrate biological barriers, though the evidence is still developing.
Fragments of plastic smaller than 1 μm have raised concerns about the potential risks they pose to the environment. Research will have to answer a number of questions to establish what the realistic risks are.