Elk River

President Joe Biden and Canadian Prime Minister Justin Trudeau have announced a forthcoming deal to “reduce and mitigate” the impact of pollution flowing into Montana and Idaho from Canadian coal mines.

Montana environmental regulators took the first step last week to tighten pollution rules for toxins flowing into Lake Koocanusa and the Kootenai River.…

Editor's note: We've corrected part of this story. Read below.Coal mines in Canada have been sending a harmful heavy metal downstream to northwest Montana…