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並前往https://ww2.arb.ca.gov/resources/inhalable-particulate-matter-and-health

Inhalable Particulate Matter and Health (PM2.5 and PM10)

Airborne particulate matter (PM) is not a single pollutant, but rather is a ... California Ambient Air Quality Standard, 12 µg/m3, None, 20 µg/m3, 50 µg/m3 ...

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