If I could just comment, the focus on an ancillary recovery is obviously one the industry has viewed favourably, given the fact that there is some economic return to offset some of the costs of the infrastructure associated with carbon capture and storage, but there are a wealth of other opportunities that have been alluded to in terms of salt caverns, depleted geological formations, or, what is most preferable from a risk and safety perspective, deep saline aquifers. The intergovernmental panel on climate change undertook a very thorough analysis of carbon capture and storage technologies and sequestration options throughout the world from a risk and safety perspective. It found the deep saline aquifers were preferable because the carbon dioxide chemically changes with that saline water becoming denser, sinking to the bottom. So the risks of having any of that come back to the surface and presenting a hazard or contributing to global warming would be very low.
On November 2nd, 2006. See this statement in context.