For the NCEES PE Environmental exam, the Clean Air Act (CAA) National Ambient Air Quality Standards (NAAQS) regulate:
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A
Greenhouse gas emissions from power plants only
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B
Six criteria pollutants including PM2.5, ozone, CO, NOx, SO₂, and lead
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C
Toxic air pollutants from hazardous waste sites
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D
International transboundary air pollution agreements