"The Clean Air Act is a law with a 40-year track record of cutting dangerous pollution to protect human health and the environment. Administered by the Environmental Protection Agency (EPA), this legislation has prevented more than 400,000 premature deaths and hundreds of millions of cases of respiratory and cardiovascular disease."
National Ambient Air Quality Standards
Chart of the current National Ambient Air Quality Standards (NAAQS). Primary standards are set to protect public health, while secondary standards protect the public welfare. The amounts listed of the six pollutants show the maximum amount of each pollutant that is allowed to be in the air.