Environmental

In North Dakota, 'radon' is a concern primarily because:

AIt causes structural damage to foundations
BIt is a naturally occurring radioactive gas that can accumulate in homes and increase lung cancer risk✓ Correct
CIt affects only agricultural properties
DIt only occurs in commercial buildings

Explanation

Radon is a naturally occurring radioactive gas produced by the decay of uranium in soil and rock. It can seep into homes through foundation cracks and accumulate to dangerous levels. North Dakota has areas with elevated radon potential, and testing/mitigation is important for indoor air quality.

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