We have done quite a bit of work in looking at the benefits of acting and the costs of inaction, if you will. We have not done a cost-benefit type of analysis. We've looked at those done by others.
We find that climate isn't the easiest to assess with a cost-benefit type of analysis, because the costs are easy, but the benefits are very difficult. They're long-term benefits and many of them are non-market in nature. It's very difficult to put a price tag on frogs, for example, or polar bears. It's harder, but that's not to say that they don't have value, because of course they do have value.
Our work shows that these costs of inaction far exceed the costs of taking action. You can look at any of the modelling of the bills, the Waxman-Markey bill or even the previous bills, and the assessments that I think have merit, the ones that take what I would call reasonable assumptions in their modelling, show that these costs are definitely manageable. That's not to say that there is a positive benefit of taking this action, but rather that the costs are small in comparison to the benefits, and the costs are definitely manageable over time.
It's a difficult proposition to look at with a cost-benefit type of framework. We have been spending some time with the integrated assessment models. Most of these do not factor in the risks of hitting a tipping point within the climate, so we think they undervalue the damage. It's a difficult proposition, but I definitely think that the benefits of taking action clearly outweigh the costs of doing so.