first of all, steve koonin, how is the forecasting?me is all predicated of forecasts over the next, what, 90 or 100 years. how do those forecasters do it? >> you know, it's a really tough business because human influences and other influences are physically small. it's about 1%. and untangling all of that from the natural variability is difficult. nevertheless, people build large computer models that take months to run, and they try to project what's going to happen with the climate over the next 80 years, let's say, you should different assumptions -- under different assumptions about greenhouse gas emissions, aerosols and so on. some of the predictions are kind of surprising, the one that may be of most interest since yours is a business show is what the economic impact is. and if and if you read the official reports put out byff the u.n. and the u. government, they say for the warming of 3 or more degrees, let's say 4 degrees by the end of this century will have a minimal impact on either the u.s. ormp the global economy. larry: rea