<Li> Authorized enforcement procedures involving interstate transport of pollutants </Li> <Li> Expanded research activities </Li> <P> Clean Air Act of 1970 </P> <Ul> <Li> Established National Ambient Air Quality Standards </Li> <Li> Established requirements for State Implementation Plans to achieve them </Li> <Li> Establishment of New Source Performance Standards for new and modified stationary sources </Li> <Li> Establishment of National Emission Standards for Hazardous Air Pollutants </Li> <Li> Increased enforcement authority </Li> <Li> Authorized control of motor vehicle emissions </Li> </Ul>

The clean air act of 1970 successfully accomplished all of the following through regulation except