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How does copper ore mining affect the environment?
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Mining and Refining – Process - Aluminium
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Chile Copper Exports - American University
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Copper extraction techniques - Wikipedia, the free encyclopedia
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Mining Process for the PolyMet Project | PolyMet
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Mining Tools of the late 1800s - Daryl Burkhard
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Biomining: How microbes help to mine copper - BBC News
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Mining - Wikipedia, the free encyclopedia
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Stillwater Palladium : How Palladium is Mined
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How is gold mined?
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