Which of the following correctly describes air quality regulation under the Clean Air Act of 1970? a. The states were authorized to define specific ambient standards and to develop plans to meet the standards and EPA only intervened when there were nonattainment areas b. Congress defined specific ambient standards but the states were not required to participate in meeting the standards c. EPA was authorized to define specific ambient standards but the states were not required to participate in meeting the standards d. all the available answers e. EPA was authorized to define specific

Which of the following correctly describes air quality regulation under the Clean Air Act of 1970? a. The states were authorized to define specific ambient standards and to develop plans to meet the standards and EPA only intervened when there were nonattainment areas b. Congress defined specific ambient standards but the states were not required to participate in meeting the standards c. EPA was authorized to define specific ambient standards but the states were not required to participate in meeting the standards d. all the available answers e. EPA was authorized to define specific