Environmental

Radon gas is a concern in Montana real estate because:

AIt is a manmade chemical found in older building materials
BIt is a naturally occurring radioactive gas that can accumulate in buildings and cause lung cancer✓ Correct
CIt is produced by agricultural chemicals used on farmland
DIt is only found in coastal areas

Explanation

Radon is a naturally occurring radioactive gas produced by uranium decay in soil and rock. Montana has areas with elevated radon levels, and long-term exposure is the second leading cause of lung cancer in the U.

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