I just want to throw in a little reality check. The WWF report was originally published some time ago. To accept the oil industry emission forecasts in that report, you have to assume that emissions from the Canadian petroleum sector will grow at a rate that is substantially faster than the rate at which production grows. By comparison, between 1990 and 2000, oil sands production doubled and their emissions increased by less than 50%. So there's some pretty fantastic forecasting going on there.
Even if you accept this somewhat less incredible forecasting and use the WWF numbers, the tar sands emissions will amount to less than 7% of the National Energy Board's best-case scenario BAU forecast. I'm not saying give the tar sands a pass, but spending enormous amounts of resources and energies bitching about 7% of the problem is.... Excuse my language.