Environmental

A Wisconsin home built in the 1960s has vermiculite insulation in the attic. This is a concern because:

AVermiculite is a fire hazard
BMuch of the vermiculite sold in the U.S. before 1990 came from Libby, Montana, and was contaminated with asbestos✓ Correct
CVermiculite reduces energy efficiency
DVermiculite is known to contain lead

Explanation

Vermiculite attic insulation from the Libby, Montana mine (Zonolite brand) is likely contaminated with asbestos; EPA recommends treating all pre-1990 vermiculite insulation as if it contains asbestos.

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