AP Environmental Scienceeasymcq1 pt
Which is an indoor air pollutant?
A.Radon
B.Stratospheric ozone
C.Sea salt aerosol
D.Volcanic ash
Explanation
Core Concept
Radon accumulates in buildings from the soil — a classic indoor hazard alongside VOCs, mold, and combustion byproducts.
Correct Answer
ARadon
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