Teck out of Canada is one of the worse mining companies for water  and air pollution. They don’t want to fess up to it.

“On March 26, the multi-billion dollar company was fined $60 million for releasing selenium and calcite, another harmful substance, into the watershed. This is the largest fine ever handed out by the Canadian government under its Federal Fisheries Act.” 

https://www.idahoconservation.org/blog/debunking-teck-on-selenium-and-water-pollution/?fbclid=IwAR3pyIeI6tovqJm_jj2zBZMlc2mLtuv0Dy-y5oPym-VOD03MKYuEHVc59Pw