Many analysts anticipate that the new rules to cut down on the severe competition China’s copper market faces, with smelters often having to fight it out for raw materials. Because of supply ...

It could mean a new day for U.S. copper mining, and new worries for environmental groups that are contesting proposals such as the stalled Twin Metals project near northern Minnesota’s Boundary ...

Arizona still produces 70% of the nation's copper supplies, but Chile has emerged as the world's top producer of copper. Large amounts of copper are refined and processed in China, then exported.

Arizona still produces 70% of the nation's copper supplies, but Chile has emerged as the world's top producer of copper. Large amounts of copper are refined and processed in China, then exported.