A couple of weeks ago I spent about a week in the Canadian Flathead, known locally as the North Fork of the Flathead. The North Fork forms the western boundary of Glacier National Park and is afforded protection under state and federal law. But in Canada, it is threatened by coal mines and coal bed methane extraction. The pollution from such mines would flow right to Glacier Park. The debate about mining the Flathead has gone on for decades. This sign, posted near the river in Canada, likely dates back to 1979 — that's when Stephen Rogers was Minister of Environment for British Columbia.