Critical US Environmental Law in 1970, __ Act

This page is the CodyCross answer for the clue below from African grasslands, Group 1542, Puzzle 3 (Pangolin and Aardvark).

Question is: Critical US Environmental Law in 1970, __ Act

and the answer is: CLEANAIR

Word Meaning:

CLEAN — Free of dirt, filth, or impurities (extraneous matter); not dirty, filthy, or soiled.

Definitions from Wiktionary.