what are the two types of standards established for critical pollutants under the clean air act? urban and…

what are the two types of standards established for critical pollutants under the clean air act? urban and rural standards city and county standards formal and casual standards primary and secondary standards

what are the two types of standards established for critical pollutants under the clean air act? urban and rural standards city and county standards formal and casual standards primary and secondary standards

Answer

Brief Explanations:

Under the Clean Air Act, the two types of standards for critical pollutants are primary (to protect public health) and secondary (to protect public welfare like visibility, ecosystems). The other options (urban - rural, city - county, formal - casual) don't relate to Clean Air Act pollutant standards.

Answer:

D. primary and secondary standards (assuming the last option is D, as the options are: urban and rural standards, city and county standards, formal and casual standards, primary and secondary standards)