Environmental

Radon gas in Hawaii properties is a concern because radon is:

AA visible gas that can be detected without testing
BA naturally occurring radioactive gas that can accumulate in enclosed spaces and increase lung cancer risk✓ Correct
CCaused by industrial operations only
DOnly a problem in multi-story commercial buildings

Explanation

Radon is a naturally occurring, colorless, odorless radioactive gas produced by the decay of uranium in soil and rock. It can accumulate in enclosed spaces (basements, lower floors) and is a known cause of lung cancer.

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