Environmental

Radon gas is a concern in many Connecticut homes because:

AIt is produced by old building materials like asbestos
BIt is a naturally occurring radioactive gas that seeps from soil and rock and can accumulate in buildings✓ Correct
CIt is released by underground oil storage tanks
DIt is emitted by older lead paint when it deteriorates

Explanation

Radon is a naturally occurring radioactive gas produced by the decay of uranium in soil and rock. It can seep into buildings through foundation cracks and is the second leading cause of lung cancer in the U.

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