James Hansen: "Canada’s tar sands, deposits of sand saturated with bitumen, contain twice the amount of carbon dioxide emitted by global oil use in our entire history."

Via Leo Hickman, here's a photo essay: "The Canadian Oil Sand Mines Refused Us Access, So We Rented A Plane To See What They Were Doing". Awe-inspiring, in much the same way as watching a crack addict in a wheelchair get high.

But it's OK, because scientists are all communists, or something.