1970+Clean+Air+Act+(1970,+with+beginning+in+1963+&+additional+amendments+in+1965+&+1990)

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CLEAN AIR ACT 1970 (Anna Lazarus and Michael Jocz)
The Clean Air Act, passed in 1970, is a comprehensive federal law that **regulates air emissions from stationary and mobile sources**. It also sets up national ambient air quality standards (NAAQS) for 6 major air pollutants and defines the responsibilities of the Environmental Protection Agency (EPA) to protect and improve the nation’s air quality.

Minor changes were made through amendments in 1977 and 1990 that set new goals for air quality standards that many areas had failed to meet. The amendment of 1977 was the first attempt to prevent the destruction of stratospheric ozone and it also extended many air quality deadlines. Later, the amendment of 1990 encouraged the use of low-sulfur fuels, as well as alternative fuels, and methods of preventing ozone depletion.

__ 6 principal pollutants __:


 * Ozone
 * Lead
 * Sulfur Dioxides
 * Carbon Monoxides
 * Particulate Matter
 * Nitrogen Oxides

Works Cited:
 * [|http://www.ametsoc.org/sloan/cleanair/cleanairlegisl.html#caa70]
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