US Proposes Adding Copper, Potash, 4 Others to Critical Minerals List

The Lavender Pit at Copper Queen Mine, which opened in 1877 and was run by the Phelps Dodge Corporation from 1879-1975, in Bisbee, Ariz., on July 24, 2020. Frederic J. Brown/AFP via Getty Images The United States Department of Interior is proposing to add six “mineral commodities” to the list of critical minerals as part