Once the bitumen has been transformed into synthetic crude oil, it takes about 10% further energy use to make transportation fuels, transport it to the end user and so on. The refining side, once you have a synthetic crude, is quite efficient.
The only other comment on the energy requirement to transform and recover the bitumen, as Dr. Guigard mentioned, is that there are two main technologies that are in use. There's the in-situ technology. I'm not sure if you saw any of those operations in your flyover yesterday. It's a completely different approach but with much higher energy consumption. Then there's the mining technology, which, as Dr. Guigard mentioned, is about 20% of the resource, and has much more land and water disturbance but much higher energy efficiency. So there are two sides of the industry. It's a little bit schizophrenic. So when you look at the statistics, you're looking at two very different sets of issues in terms of the pattern of environmental impact and the pattern of energy use.