copper The World's Healthiest FoodsBasic Description. Copper is a key mineral in many different body systems. It is central to building strong tissue, maintaining blood volume, and producing en

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copper processing Britannica.comcopper processing: The extraction of copper from its ores and the preparation of copper metal or chemical compounds for use in various products. In its pure form

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