Copper mining in the United States WikipediaCopper mining in the United States has been a major industry since the rise of the northern Michigan copper district in the 1840s. In 2014 the United

Coal mining WikipediaCoal mining is the process of extracting coal from the ground. Coal is valued for its energy content, and, since the 1880s, has been widely used to generate electricity.Min

Antimony WikipediaAntimony is a chemical element with symbol Sb (from Latin: stibium) and atomic number 51. A lustrous gray metalloid, it is found in nature mainly as the sulfide ...Antimony tr

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