Underground coal mines have a high risk of fires, which can burn for many years.
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Q11: In the diagram, the densest part of
Q12: Forces of weathering are most directly responsible
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Q14: A lesson from the Ducktown, Tennessee mining
Q15: In the diagram, the semisolid part of
Q17: Rocks formed from solidified magma are known
Q18: Existing U.S. mining law is based on
Q19: Landslides and mudslides are examples of
A) mass
Q20: Using recycled materials utilizes about as much
Q21: Water, wind, and glaciers are examples of
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