Environmental

Carbon monoxide is a hazard associated with:

AOld lead paint in pre-1978 homes
BImproperly vented combustion appliances such as furnaces, water heaters, and gas stoves✓ Correct
CRadon gas in basements
DUnderground storage tank leakage

Explanation

Carbon monoxide (CO) is produced by incomplete combustion from furnaces, water heaters, gas stoves, and other appliances. Improperly vented or malfunctioning appliances can allow CO to accumulate indoors, posing a potentially fatal risk.

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