Question

Which of the following statements is true of national ambient air quality standards (NAAQS)?
A) They divide pollutants into five categories based exclusively on the risks the pollutants pose to human beings.
B) They are set at two different levels: primary and secondary.
C) They apply to all sources of pollution.
D) They are administered exclusively by the federal government.

Answer

This answer is hidden. It contains 1 characters.