Environmental
Urea-formaldehyde foam insulation (UFFI) is a concern in older homes because it can:
ACause structural damage to walls
BOff-gas formaldehyde vapors that are harmful to indoor air quality✓ Correct
CAttract insects and pests
DIncrease a home's fire risk
Explanation
UFFI used in homes in the late 1970s and early 1980s was found to off-gas formaldehyde, a potential carcinogen, degrading indoor air quality. Its use was largely banned in residences.
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