I will try, with some trepidation. I am not an economist.
The issue, in my view, is climate change. As Dr. Villeneuve said, Kyoto is a first small step. Tackling climate change requires long-term, medium-term, and short-term targets and actions. As Professor Villeneuve mentioned, if we want to stabilize the climate, it's going to take a reduction of between 60% to 80%.
Kyoto can be interpreted as giving guidance to short-term actions. It provides us with the chance to experiment, to learn. It gives a signal, and with the right amount of will and political instruments, it allows us to attempt to in fact meet those commitments.
Finally, just to conclude, I will mention the example of British Petroleum. A year or so ago, I was invited to visit them to talk about climate change and the science of it. John Browne is the chief executive officer of British Petroleum, and in the mid-1990s he committed British Petroleum to return their emissions to 1990 levels by 2010. They achieved it in 2001, and they added $600 million to the value of the company.