Environmental

Colorado has some of the highest radon levels in the nation. Radon is:

AA water contaminant introduced through agricultural runoff
BA naturally occurring radioactive gas produced by uranium decay in soil and rock✓ Correct
CAn industrial chemical stored at manufacturing facilities
DA byproduct of lead paint deterioration

Explanation

Radon is a colorless, odorless radioactive gas produced by the natural decay of uranium in soil, rock, and water. Colorado's geology makes radon a significant concern. The EPA recommends mitigation when levels exceed 4 picocuries per liter (pCi/L).

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