Fur trade a suspect in Minnesota monument mercury contamination
Great Lakes Echo,
How long does pollution linger? At Minnesota's Grand Portage National Monument, high levels of toxic mercury may date back to…
How long does pollution linger? At Minnesota's Grand Portage National Monument, high levels of toxic mercury may date back to…
Minnesota's Grand Portage National Monument (GPNM) is a homage to the state's rich fur-trading past. However, researchers are…
In Minnesota, high levels of mercury may date back to the 1700s -- Read more on ScientificAmerican.com