Canada’s mining boom spills into U.S. waters

Over the last decade, the Canadian government has expedited a mining boom in western British Columbia by rolling back one environmental regulation after another. The Navigable Waters Protection Act, for example, once protected more than a million Canadian rivers and 32,000 lakes. As of 2012, that number was down to just 66, leaving some of British Columbia’s wildest, richest and largest rivers exempt from environmental safeguards.
https://www.hcn.org/articles/canadas-mining-boom-spills-into-to-u-s-waters