The World Resources Institute has been valuable, and especially when it's co-operated with other organizations. Because policy studies are essential in this area: if you push in one place you're likely to have effects in some very distant place, and you can't do just one thing, as somebody said, so it's essential to have rather careful, well-designed policy studies covering many different fields, many different areas of… many different kinds of subject matter all interlocking, all interacting to try to see what the effects of actions are likely to be, and even then it's only probabilistic, but it's extremely important, before taking action. Of course one shouldn't be paralyzed and trapped into inaction by the fact that there is uncertainty; one must act in the face of some degree of uncertainty. The arguments about doing something about global climate change, for instance, are many of them very silly. Some people want to wait until there is unmistakable scientific evidence of a particular kind of climate change, like global warming, but that's absurd: by that time it's absolutely certain that this will be happening it'll be too late to do anything about it. It's important to take out insurance. We took out trillions and trillions of dollars of insurance against the unlikely but undesirable event that a… a Soviet invasion of Western Europe would have been. In the same way, if we're monkeying with the fundamental parameters of the atmosphere of the only planet we have to live on, we should be rather conservative, and why someone who calls himself or herself a conservative would be against taking out a lot of insurance in this domain, I can't possibly understand. The conservative… the conservative way to do things is to… is to make a considerable effort to reduce greenhouse gases, and reduce the emissions of greenhouse gases and so on.