Environmental

Carbon monoxide (CO) in a home is most often produced by:

AOff-gassing from carpet and furniture
BMalfunctioning fuel-burning appliances such as furnaces, water heaters, or attached garage vehicles✓ Correct
CUranium deposits in the soil beneath the foundation
DOld electrical wiring

Explanation

Carbon monoxide is an odorless, colorless gas produced by incomplete combustion from fuel-burning appliances (furnaces, fireplaces, generators, vehicles in garages). Nebraska homes should have CO detectors.

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