Definition of clean air act

1) The Clean Air Act passed in 1970 and later in November of 1990 made into law established nationwide levels of acceptable air pollution from automobiles, individuals, and industry. The Environmental Protection Agency is responsible for enforcement of standards and regulations of the Clean Air Act.

source: [Sell, J. Nancy. Industrial Pollution Control: Issues and Techniques 2nd Edition. 1994 John Wiley & Sons, Inc]