It's almost 90%, so the drop from the Athabasca River is very limited. Nonetheless, you will inevitably reach a point at which you're taking all the water from the river that you can, and then the only way you can expand beyond that is to improve that rate of recycling, or develop technology so that you're becoming less water-intensive.
I'd point to two aspects here in the longer-term dimension of the issue. The first is something that the Government of Alberta is undertaking, which is called the mineable oil sands strategy. The federal government is participating fully in that, and I would say enthusiastically in that, to look at some of these longer-term issues and at how we might address them.
The second way we're addressing it is through science and technology and research. There are, in fact, projects underway at C-Tech on water use in the oil sands, and on how we reduce that.
With respect to carbon dioxide, because oil sands production is energy intensive, it follows that it is, by definition, greenhouse gas intensive. It is also the case that the production of hydrogen, which is used to upgrade the bitumen to make synthetic crude, is also intensive in the release of greenhouse gases. Here I would point of course to the tabling today of the proposed Clean Air Act, which lays out a strategy for regulating greenhouse gas emissions.