Environmental

In New Mexico, 'caliche' found in soil can affect construction because it:

AIs a highly fertile topsoil
BForms a hard, calcium carbonate layer that impedes drainage and excavation✓ Correct
CIs radioactive
DContains asbestos fibers

Explanation

Caliche is a hardened calcium carbonate soil layer common throughout the Southwest, including New Mexico. It can impede drainage, make excavation difficult, and affect foundation design.

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