When the Great Lakes Water Quality Agreement was passed in the 1970s, eutrophication was the big problem. Eutrophication occurs when too many nutrients enter a body of water, increasing the amount of ...

The court said the state agency must determine, again, whether the planned expansion of a basin holding back mine waste near Lake Superior requires an environmental impact statement.

The Milepost 7 tailings basin photographed from a helicopter in 2010. Pictured beyond the basin is Silver Bay, the Northshore Mining processing plant, and Lake Superior. (Provided by Lori Andresen) ...

Attorney General Lori Swanson announced that Minnesota and other Great Lakes border states won a case against the Environmental Protection Agency over ballast water discharge regulations. This ...

Lake Superior alone holds 10 percent of the world's readily available freshwater, and by surface area is the world's largest freshwater lake. This immense lake, however, is facing a major threat of ...

Gulls and terns studied in known polluted shoreline areas had a host of worse health and reproductive outcomes than those in nonpolluted areas.

Lake Superior alone holds 10 percent of the world's readily available freshwater, and by surface area is the world's largest freshwater lake. This immense lake, however, is facing a major threat of ...