Environmental

Asbestos-containing materials in buildings become hazardous primarily when they are:

AUndisturbed and in good condition
BFriable (crumbling or deteriorating) and release fibers into the air✓ Correct
CLocated in exterior walls only
DInspected by a certified inspector

Explanation

Asbestos is most dangerous when it is friable — able to be crumbled by hand pressure and releasing fibers into the air. Intact, well-maintained asbestos materials may pose minimal risk if left undisturbed.

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