Lifestyle could well be part of the picture, but so could oil sands operations. I agree that it could be one or the other, but the fact remains the processing of the tar sands releases massive amounts of nitrogen oxides, sulfur dioxide and volatile organic compounds into the atmosphere. There are other risks for public health, and you are undoubtedly aware of that. Other studies show that people could develop respiratory problems linked to the air quality, as well as multiple sclerosis.
Do you have data showing that tar sands operations could in fact cause other diseases?