EPA tightens national annual PM2.5 standard to 12 µg/m3
Green Car Congress
DECEMBER 14, 2012
In response to a court order, the US Environmental Protection Agency (EPA) finalized an update to its national air quality standards for harmful fine particle pollution (PM 2.5 ), including soot, setting the annual health (primary) standard at 12 µg/m 3. By 2030, EPA expects that all standards that cut PM 2.5
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