What is NOT regulated by the Clean Air Act?
Dihydrogen monoxideDihydrogen monoxide
29%Sulfur dioxideSulfur dioxide
11%Carbon monoxideCarbon monoxide
19%Ground-level ozoneGround-level ozone
41%The Clean Air Act, which was passed by the U.S. government in 1970, regulates air emissions from certain pollutants. The law requires the EPA to set national ambient air quality standards for six common air pollutants: carbon monoxide, ground-level ozone, lead, nitrogen oxides, particulate matter, and sulfur dioxide.
Source: EPA