Environmental

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

AMunicipal water treatment systems
BCracks and openings in foundation floors and walls from underlying soil and rock✓ Correct
CRoof ventilation systems
DOld asbestos-containing ceiling tiles

Explanation

Radon is a colorless, odorless gas produced by the decay of uranium in NH's granite bedrock. It typically enters homes through cracks in foundation floors and walls, sump pits, and other openings.

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