US plan would block Antofagasta Minnesota copper mine

The US Forest Service on Wednesday proposed a 20-year ban on mining in Minnesota's Boundary Waters region, a step that would block Antofagasta's Twin Metals copper and nickel mine project.

The announcement reversed a decision by former President Donald Trump and set off a review of how mining could affect the popular outdoor recreational area. It freezes issuance of new mining leases or permits in the region for two years.