Grist: Drilling for tar-sands oil in Alberta has long been recognized as a driver of climate change, helping to nudge the mercury up in thermometers around the world. Now, it appears that it`s also dousing the Canadian province with straight-up mercury pollution.
Canadian government researchers have discovered that oil-sands operations have puffed out mercury over 4.7 million acres of northeast Alberta, boosting levels to as much as 16 times higher than background levels. Mercury is a potent poison that`s...