Perhaps I can refer specifically to greenhouse gas performance. This is Environment Canada data. Since 1990, we have improved the greenhouse gas intensity of the oilsands production by 33%. So there has been a very significant improvement in the overall greenhouse gas performance of our industry.
I would also point you to some recent work that's been done by a couple of different independent bodies that have compared the greenhouse gas emissions full life cycle from oil sands to that of other crudes used in the United States. What they show is that oil sands greenhouse gas performance falls within the band of production from almost all other sources that the U.S. has for crude oil that it consumes in the United States. So if you look at full life cycle, our position is that oil sands falls within the range of supplies that are available to the U.S. market.