Mercury taints wildlife refuge
Water in the restored wetlands of the Glacial Ridge National Wildlife Refuge near Crookston, Minn., has extraordinarily high levels of toxic methylmercury, according to a new U.S. Geological Survey research … Read more
Water in the restored wetlands of the Glacial Ridge National Wildlife Refuge near Crookston, Minn., has extraordinarily high levels of toxic methylmercury, according to a new U.S. Geological Survey research … Read more