AP Environmental Scienceeasymcq1 pt

Photochemical smog requires

A.NOx, VOCs, and sunlight
B.SO₂ and water only
C.CFCs and UV light in the stratosphere
D.CO₂ and infrared radiation

Explanation

Core Concept

Sunlight drives the reactions between nitrogen oxides and volatile organics that build tropospheric ozone — why smog peaks on sunny afternoons in car-heavy cities.

Correct Answer

ANOx, VOCs, and sunlight

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