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