Canadian Geographic magazine, utilizing research completed by a group of about 20 American and Canadian researchers and environmentalists led by David Allen, a professor at the University of Michigan’s School of Natural Resources and Environment, has put together an excellent set of maps illustrating the cumulative impacts of human activity across the Great Lakes. The maps include items ranging from PCBs in sediment through impacts of dams on tributaries, reduced ice cover and nutrients like phosphorous.
Read about the maps in an online Canadian Geographic article. Click on the map in the article to view the maps.