These six pollutants are known as the criteria pollutants and are covered by the National Ambient Air Quality Standards.

Question

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The six criteria pollutants, as defined by the United States Environmental Protection Agency (EPA) under the Clean Air Act, are particulate matter, sulfur dioxide, carbon monoxide, nitrogen oxides, lead, and ozone. These pollutants are known to harm human health and the environment, leading to the establishment of the National Ambient Air Quality Standards (NAAQS) to regulate their levels in the air.

These Six Pollutants Are Known as the Criteria Pollutants and Are