Researchers who studied three generations of mothers and their children from the community of Grassy Narrows, Ontario, have concluded that sustained exposure to the toxic metal helped cause a suicide rate three times higher than any other First Nations community – which are already far higher than among the country’s general population.
Maybe it was mixed in with something else and wasn’t considered valuable enough to salvage/filter out. I also wonder if the 20,000lbs number is over a period of many years. Super messed up either way though, I don’t even know where one would start cleaning this up. :(