Clean Air Act Amendments of 1990

The Clean Air Act Amendments (CAAA) of 1990 amended the original Clean Air Act (CAA) of 1970. The CAAA of 1990 created several initiatives to reduce mobile source pollutants, thereby pursuing one of the original goals of CAA. The CAAA establishes standards and procedures for reducing human and environmental exposure to a range of pollutants generated by industry and transportation. States have to develop state implementation plans that explain how they will carry out initiatives outlined by the CAAA. The U.S. Environmental Protection Agency assists the states by providing scientific research, expert studies, engineering designs and money to support clean air programs. For more information, visit the EPA's Plain English Guide to the Clean Air Act.