A copper mine in British Columbia produces a metal the world needs to phase out fossil fuels. It holds promise — and danger.

Buyers in the U.S. have been stocking up on copper ahead of potential tariffs. Future prices for the base metal's most traded contract rose to $5.24 per pound on Wednesday. Prices are up about 30% ...

Here, among the northern reaches of the Columbia Basin, humanity’s knack ... Globally, about 22 million metric tons of copper are mined each year. The metal has long been treasured for its ...