Environmental

Urea formaldehyde foam insulation (UFFI) was commonly used in Connecticut homes in the 1970s. It was banned for residential use because:

AIt caused structural damage to foundation walls
BIt off-gasses formaldehyde, a volatile organic compound that causes health problems✓ Correct
CIt contained lead and was toxic to children
DIt was a fire hazard and violated building codes

Explanation

UFFI was banned for residential use in 1982 after studies showed it off-gasses formaldehyde gas, which is a respiratory irritant and possible carcinogen. Properties with UFFI should be disclosed.

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