Environmental

Formaldehyde off-gassing in homes is most commonly associated with:

AOld water pipes
BPressed wood products, composite materials, and some building adhesives✓ Correct
CAsphalt roofing materials
DExterior brick and mortar

Explanation

Formaldehyde is a VOC (volatile organic compound) that off-gases from pressed wood products (particleboard, MDF, plywood), composite wood cabinets and flooring, adhesives, and some insulation. High indoor concentrations can cause respiratory irritation.

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