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copper ore impact with 42 years

Copper mining in the United States has been a major industry since the rise of the northern Michigan copper district in the 1840s. In 2017 the United States produced 1.27 million metric tonnes of copper, worth 8 billion, making it the world39s fourth largest copper producer, after Chile, China, and was produced from 23 mines in the US. Top copper producing states in 2014 were in

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