What is the Clean Air Act?
1963 is the first year Clean Air Act was amended.
The first effort on the part of the United States Congress to provide a solution the nation's air pollution problem began with the passage of the Air Pollution Control Act of 1955. This turning-point opened the door to federal participation in efforts to deal with air pollution. This was followed by a series of legislational efforts by Congress that included the Cean Air Act of 1963, 1966, 1970, 1977, and 1990, (etc.) all of which are referred to as the Clean Air Act (CAA).
Much of the real structure to the CAA was established in the 1970 Amendments. For instance, National Ambient Air Quality Standards were determined. CAA required New Source Performance Standards (NSPS) to be set up that would limit emissions from certain industrial establishments and from motor vehicles.
National Ambient Air Quality Standards are (1) carbon monoxide, (2) lead, (3) nitrogen dioxide, (4) particulate matter (10 microns), (5) particulate matter (2.5 microns), (6) ozone, and (7) sülfür dioxide.