Environmental
Urea-formaldehyde foam insulation (UFFI) installed in older Idaho homes is a concern because:
AIt causes structural damage
BIt can off-gas formaldehyde, a potential carcinogen and irritant✓ Correct
CIt attracts pests
DIt creates fire hazards
Explanation
UFFI was used as insulation in the 1970s and can release formaldehyde gas over time. Formaldehyde is classified as a probable human carcinogen and can cause respiratory irritation. HUD banned UFFI in federally backed housing.
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