That's a matter for negotiation. You would have to look at different countries and what they're able to contribute and what would be reasonable as an equivalent effort.
Without commenting at all on Canadian policy, I would just say that I think that Europe at Kyoto was prepared to proceed with the commitments it had made, despite the fact that the U.S., in the end, was unable to ratify the agreement and that China and others were not a part of it. There were some who said that this would be a ruinous thing to do and that we would be fools to follow through on our Kyoto commitments. But we believe it was a necessary thing for the world and that somebody had to start this process. We couldn't all wait until everybody moved together, because it wasn't going to happen. Somebody had to create the momentum and get the thing going.
I think that although we do act as a single union and move together and have a single target as a union, the individual countries still have national plans and are driving them, because they believe it to be necessary, not simply because they're going to wait for the rest of the European Union and move only when the rest move.