Went to see the movie at the OMNI theater at the science museum of MN. The movie details the plight of the Lake Sturgeon and efforts to save them and restore them to their native ranges, the massive pollution that occurred during the industrial era, the urgent need to protect our freshwater resources, and the problem of invasive species. If you have the oportunity to see this movie in your area, I highly suggest you do so.
http://sciencenorth.ca/consumer-sites/mysteries-lakes/
http://sciencenorth.ca/consumer-sites/mysteries-lakes/