Question

what did the 1970 revision of the clean air act establish for the critical pollutants? removed all fines on polluters specific disposal locations no legal limits on pollution ambient air quality standards

Explanation:

The 1970 revision of the Clean Air Act was a significant environmental legislation. It aimed to address air pollution. Removing fines on polluters (first option) would not be a logical step in combating pollution. Specific disposal locations (second option) are more related to waste management regulations rather than the core of the Clean Air Act's 1970 revision. Saying there are no legal limits on pollution (third option) is contrary to the purpose of the Clean Air Act. The Clean Air Act of 1970 established ambient - air quality standards. These standards set limits on the concentration of certain pollutants in the outdoor air to protect public health and the environment.

Answer:

ambient air quality standards