AP Environmental Scienceeasymcq1 pt
The Clean Air Act of 1970 primarily
A.set national standards for six criteria pollutants
B.banned all cars
C.phased out CFCs
D.regulated only indoor air
Explanation
Core Concept
The Act regulated CO, lead, NO₂, ozone, particulates, and SO₂, driving catalytic converters and scrubbers — dramatic air-quality gains followed.
Correct Answer
Aset national standards for six criteria pollutants
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