The Clean Air Act of 1963 was the first federal law about air pollution control which approved research about methods to reduce air pollution as well as federal programs to confront the issue. It was expanded by the Nixon administration in 1970 and established that:
- National Ambient Air Quality Standards are meant to protect the environment and human health
- The EPA’s New Source Performance Standards must be used to figure out pollution allotments for each industry
- The auto industry must cut emissions by 90%
- States are encouraged to plan to meet CAA standards and have the plans approved by the EPA
The Clean Air Act was amended twice, 1987 and 1990.