1. Clean Air Act of 1963,1965, 1970,1977,1990(CAA)
Kaylee Kirpatrick

2. 1963,1965,1970
1963: There was a Clean Air Act proposed and passed in 1963 and it referred to the control of air pollution.
The original Clean Air Act supported/supports research into both observing and documenting air pollution and trying to manage it
An expansion of perspective was also part of it in two ways, interstate movement of air pollution was now included into a management view and, the increased focus on stationary sources of air pollution became more active
1965: The 1965 amendment required the U.S. Department of Health, Education and Services to create and enforce auto emission standards.
1970: resulted in a major shift in the federal government's role in air pollution control. This legislation authorized the development of comprehensive federal and state regulations to limit emissions from both stationary (industrial) sources and mobile sources.

3. 1977 & 1990
1977:Major amendments were added to the Clean Air Act in 1977 (1977 CAAA). The 1977 Amendments primarily concerned provisions for the Prevention of Significant Deterioration (PSD) of air quality in areas attaining the NAAQS.
1990:Another set of major amendments to the Clean Air Act occurred in 1990 (1990 CAAA). The 1990 CAAA substantially increased the authority and responsibility of the federal government.
New regulatory programs were authorized for control of acid deposition (acid rain) and for the issuance of stationary source operating permits.