It was always my understanding that tar sands (and fracked shale gas) were literally the dregs at the bottom of the barrel, and cost more, FAR MORE, environmentally to extract than they were worth, so its not surprising.
We should leave those resources in the ground and end this idiotic gold rush to steal as much from the planet as we can before she and her people wise up.
If the trans national extractive industries want to extract wealth from the Earth, only allow it when its clear it can be dne without the huge environmental costs to peoples health it often has today, make them buy insurance, make them take out huge bonds, paid upfront, then let them do it.
Tax the shit out of them, and DONT put our nations and the taxpayer on the line for anything involving the environmental mistakes and debts of the rich. Let them pay their true costs.
I am so sick and tired of these corporations stealing the nation blind.