Foreign corporations are trying to open copper sulfide mines in Minnesota, which threaten to pollute some of the cleanest water in the country. PolyMet, a copper sulfide mine proposed by Swiss conglomerate Glencore, would be an ecological disaster for Lake Superior. Twin Metals, a mine proposed by Chilean conglomerate Antofagasta, would pollute the Boundary Waters Conoe Area Wilderness. For years, Friends of the Boundary Waters Wilderness has been central in the fight to stop this toxic mining. In this presentation, you'll learn about the threat that this type of mining poses to Minnesota and the Great Lakes, and what you can do help protect clean water.