 St. Paul, Minnesota--Newsfile Corp. - May 6, 2021 - PolyMet Mining Corp. TSX: POM NYSE American: PLM today reports it has filed its financial results for the three months ended March 31, 2021 and provides a business update.The company made meaningful progress in litigation, continued its focus on optimization and engineering efforts related to the NorthMet Project, and maintained full compliance with all operating permits during the period, according to Jon Cherry, chairman, president and... 