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Biology, 17.10.2020 09:01 polarbear3787

Which of these statements about particulate matter less than 2.5 microns in diameter is true? A. They're less of a threat than particulate matter that's 10 microns in diameter.
B. They can cause heart and lung disease.
C. They're produced from nitrogen gas (N2).
D. They're the size of a human hair.

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