Environmental

Oklahoma has active coal mining regions. Former coal mine sites may present real estate hazards including:

AOnly improved soil quality from mining activity
BSubsidence (ground sinkage), acid mine drainage, and soil contamination that can affect adjacent properties' stability, value, and usability✓ Correct
CNo hazards because mining ended decades ago
DOnly traffic congestion near mine sites

Explanation

Abandoned coal mines in eastern Oklahoma can cause subsidence (surface sinkage), acid mine drainage affecting water quality, and soil contamination. These issues can significantly impact nearby property values, development potential, and safety.

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