L.A. Times article I read this morning said the following:
"A new study has detected air pollutants, including carcinogents, in areas downwind of Canada's mail fossil fuel hub in Alberta at levels rivaling those of major metropolises such as Beijing and Mexico City. The study by researchers from UC Irvine and the University of Michigan also found a high incidence of blood cancers such as leukemia and non-Hodgkin's lymphoma among men in the area, compared to the rest of Alberta."
My thought is this: the longer the people live around this pollution, water, air, etc., the greater the illnesses and the more impacted. Would I live in Beijing? No. They say the life span of Beijing residents is 5 years less than other areas of China due to the pollution.