He’s well aware of the long-term negative impacts of acid mine runoff from the Zortman/Landusky mine in northeast Montana and in Butte, where the 900-foot-deep Berkeley Pit, carved out from a ...

The copper deposits beneath the lakes and forests of Northeastern Minnesota are encased in sulfide ore. When that ore is exposed to air and water in the mining process, it produces sulfuric acid.

The average grade of ore has also diminished by around 40% since 1991, BHP says. ... Another planned copper mine in Arizona and two in Minnesota have run into significant delays.

Mining isn’t known for innovation. For more than a century, we’ve extracted copper using the same process: dig, crush, grind, leach, repeat. Meanwhile, demand has exploded, fueled by EVs, AI ...

The remaining 80% of the world’s copper comes from copper sulfide ores, which don’t dissolve well in acid. To extract that copper, the industry uses a more energy- and water-intensive process ...

Crawford vividly remembers the sulfur smoke emitted from the stacks as a child ... Faraday Copper told ABC15 that no mining will be done anytime soon as they are currently in the early stages ...