I will confess that in all of my studies I haven't considered the cost of not doing anything. It is important that we, to some extent, take into consideration that when we are not doing anything we are aggravating the situation. The Stern report that you are referring to did, as you said, compute the cost. The problem in computing these costs is there are uncertainties on the exact cost of not doing anything. But assuming that we do know that in the future there will be some costs, what are the costs of implementing the policies that we have today? There's a difficulty here in terms of balancing the cost of today, the cost that you're going to bear today, and the cost of not doing anything tomorrow.
We do know that the rising temperature will cause some damage, but in terms of our knowledge, we don't know exactly. And our knowledge is increasing. Things that we didn't know before, we know today. Even the scientific...the climatologists who designed some modern models to know what's going to happen are making some errors, because there are things that we don't know and we are discovering new things. So for somebody to say that this is the exact cost of not doing anything tomorrow is a little bit difficult.