It's difficult to comment on the ratio of profits to investment in research and development, particularly on environmental technologies, since we don't know exactly how much is going towards environmental technologies. What I will say about investment in research and development is that it is, of course, right now being directed not only at improving environmental performance, but there also has to be a cost payout. For example, around greenhouse gas emissions, energy efficiency is where the majority of the money is going, as opposed to things like carbon capture and storage, which doesn't necessarily have that economic benefit.
If we had regulations in place or full-cost accounting that actually began to place value on something like carbon, then all of a sudden the dynamic around where you spend your research and development dollars changes because there's a cost associated with not doing so. I think then, because we would have the balance sheet filled out, we'd probably begin to see more targeted investment in things like carbon capture and storage, and we'd actually see it on the ground as opposed to something that gets a lot of discussion but not a lot of action.