Question

which piece of legislation designated the seven criteria air pollutants? clean water act kyoto protocol clean air act endangered species act

Explanation:

The Clean Air Act in the US is legislation that designates the seven criteria air pollutants (like particulate matter, ozone, etc.). The Clean Water Act focuses on water quality, the Kyoto Protocol is an international treaty on greenhouse gases, and the Endangered Species Act protects species, not air pollutants.

Answer:

C. Clean Air Act