Yes. CCS, or carbon capture and storage, is at an early stage, and it is an expensive technology. You're seeing the testing of that development now under way through a number of operations. So you're right.
Can we be more efficient? I think the discussion this afternoon was around whether we could be more efficient so that we're not creating...or the amount of carbon is reduced. That's the focus where we are. If we can apply the addition of solvent to steam effectively, we will produce less CO2 right at the beginning. And that is our objective. We think it is an approach that will allow us to have an impact sooner. CCS is an area that is clearly under development. But for us as a company we are very much focused on producing less.