U.S. Rep. Betty McCollum (D-Minn.) reintroduced a bill on Jan. 21 to ban sulfide-ore copper mining in the Boundary Waters ...

In his statement, Stauber says his bill would reinstate mineral leases in the area, describing that Biden's decision to ...

One is that it's becoming difficult for current mining practices to keep up ... process is capable of extracting 99% of copper from sulfide ore. Traditional leaching extracts something like ...