Which of the following best describes the primary cause of the environmental problem known as acid-mine drainage?
A) chemical breakdown of sulfide minerals
B) use of strong acids during mining operations
C) excessive mining regulations
D) poorly ventilated underground mines
E) all of the answers listed here
Correct Answer:
Verified
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Q12: Some minerals are economical to mine at
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Q16: What is a mineral resource?
A) any rock
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