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What is the main reason for acid mine drainage?

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What is the main reason for acid mine drainage?

(a) Dirty gold mining

(b) Ground water

(c) Soil erosion

(d) Granite mining

The question was posed to me in homework.

This interesting question is from Major Environmental Problems Associated with Selected Industry Sector topic in division Environmental Clearance for Establishing and Operating Industries in India of Energy Management

1 Answer

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Correct option is (a) Dirty gold mining

Explanation: Dirty gold mining often leads to a persistent problem known as acid mine drainage. The problem results when underground rock disturbed by mining is newly exposed to air and water. Acidic water draining from mine sites is more concentrated than acid rain.

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