Environmental

In Missouri, the presence of 'formaldehyde' emissions from building materials is a concern because:

AIt only affects commercial buildings
BFormaldehyde is a carcinogen that can off-gas from composite wood products, adhesives, and other building materials✓ Correct
CIt is only a concern in new construction
DMissouri law bans all formaldehyde-containing products

Explanation

Formaldehyde off-gassing from composite wood products (particleboard, MDF, plywood), insulation, and adhesives is an indoor air quality concern. It is classified as a human carcinogen and is particularly concerning in newer or recently renovated homes.

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