Environmental

In New Mexico, 'vapor intrusion' is an environmental concern when:

ARadon gas enters from below grade
BVolatile contaminants in contaminated soil or groundwater evaporate and migrate into overlying structures through foundation cracks or gaps✓ Correct
CCarbon monoxide from attached garages enters living spaces
DMold spores spread from unit to unit

Explanation

Vapor intrusion occurs when chemicals (such as dry cleaning solvents or petroleum products) in contaminated soil or groundwater volatilize and migrate upward into buildings, creating indoor air quality and health concerns — relevant near former industrial or commercial sites.

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