The document discusses PolyMet Mining, a company based in Minnesota that is proposing an open-pit sulfide copper-nickel mine near Babbitt. Key points include: PolyMet began in 1981 and does not have prior experience with sulfide mining; Glencore has the largest investment in PolyMet; potential environmental impacts of sulfide mining include risks to nearby watersheds from past mining operations; PolyMet estimates annual production of copper, nickel, cobalt, platinum, palladium, gold and other metals if permitted; and there is debate around whether the economic benefits outweigh the potential environmental and health risks of the project.