Environmental

Radon is a concern in New Hampshire because:

AIt enters homes through contaminated city water systems
BNH has granite bedrock and soils that naturally produce radon gas✓ Correct
CIt is introduced by older plumbing systems
DIt is only found in coastal areas

Explanation

New Hampshire's granite bedrock and glacial soils make it one of the states with elevated radon levels. Radon gas seeps up from the ground and can accumulate in basements and lower floors of homes.

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