Thank you very much, Mr. Chairman.
Let me ask you about this question of what we've just been hearing about in terms of a carbon tax, which of course is different from a carbon budget or cap and trade system, although my colleagues in the Conservative Party don't seem to be able to grasp those differences, I gather, from what they're saying.
Let me ask you this question. In view of the rise we've seen in oil prices over the past year or so particularly, how much behavioural change has that created? How much of a tax in terms of this proposal--which we don't support, that is, the tax itself--are you talking about in order to have the impact on behavioural change that would be required?