Environmental
Urea formaldehyde foam insulation (UFFI) is a concern because:
AIt is highly flammable and creates a fire hazard
BIt can off-gas formaldehyde fumes, which may cause health problems✓ Correct
CIt deteriorates rapidly and causes structural damage
DIt absorbs moisture and causes mold growth
Explanation
UFFI (urea-formaldehyde foam insulation) was used widely in the 1970s. It can off-gas formaldehyde, an irritant and potential carcinogen, into indoor air. Its use in residential housing was banned by the FTC in 1982, though the ban was later overturned; it is still a disclosure concern.
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