Environmental

Radon is a naturally occurring radioactive gas that enters homes through:

AContaminated municipal water systems
BCracks in foundations and soil contact areas✓ Correct
CDeteriorating roof materials
DOld electrical wiring

Explanation

Radon gas is produced by the natural decay of uranium in soil and rock. It enters homes through cracks in foundations, construction joints, and gaps around service pipes. Oklahoma has areas with elevated radon risk.

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