How successful was the clean air act of 1970?

The enactment of the Clean Air Act of 1970 (1970 CAA) 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

The senetors had full control aka rich nobles but plebians part of the middle class would rise and revolt and gain equal citizenship