Environmental

Urea-formaldehyde foam insulation (UFFI) was used widely in homes during the 1970s and is a concern because it:

AIs flammable and increases fire risk
BCan off-gas formaldehyde, an irritant and potential carcinogen✓ Correct
CContains asbestos fibers
DCauses lead contamination in household water

Explanation

UFFI can release formaldehyde gas over time, causing indoor air quality problems. Formaldehyde is classified as a probable human carcinogen and can irritate eyes, nose, and throat.

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