NASA says that the pollution caused by the oil sands is comparable to a large sized coal fired generating plant or a moderate sized city. There are 600 coal-fired generating plants in the US alone...
granted, I have no reference to that statistic...but it appears neither do you to yours...and I don't know how old your stats are.
I can, however, reference the fact that oil sands are planning to destroy 25k acres of forest for expansion. The Canadian Boreal forest is the world’s largest terrestrial carbon storehouse and home to the largest forest wetland ecosystems left on the planet, so their environmental impact will be exponential.