Environmental

Colorado's 'Coal Mine Subsidence' concerns relate to real estate because:

AA. Only properties in active mining zones are affected
BB. Properties built above old coal mine workings may be at risk of ground subsidence — sinking or collapse — affecting structural integrity and property values✓ Correct
CC. Subsidence only affects commercial properties
DD. All Colorado properties must be tested for subsidence

Explanation

Colorado has extensive areas of historical coal mining (especially in Fremont, Las Animas, Boulder, and Weld Counties). Properties above old mine works may experience ground subsidence — gradual or sudden sinking — that can damage foundations and structures. Buyers of properties in historically mined areas should investigate subsidence risk.

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