Perhaps I could answer first.
We've already agreed that we will offer 20% by 2020 in the context of an international agreement. If there can be an ambitious agreement in Copenhagen, then we've said that we will want to increase that to 30%. So we will be affected by the ambition of the outcome from Copenhagen.
On the question of who it binds, it binds the European Union. Within the next two weeks, the Treaty of Lisbon is going to come into force and the European Union will have a legal personality. But we are taking on a commitment as a union, and then through our national policies we will aim to deliver on that together. If the European Union finds that the overall target is not being achieved, then the heads of government will meet and will have to decide on who will have to make a bigger national effort.