Freeman Dyson is simply wrong. And the warming world will prove that.
Those who have extensively studied atmospheric physics, and whose predictions have been verified are the people that one should listen to. The leading such person at present is Dr. James Hansen. And he has been on the recieving end of much hate because of it.
It is interesting to see the deniers flap-yap constantly changing. First there was no warming. But it became so obvious to everyone that there was, that they then changed that to 'well, it all natural'. Then there is no sea rise, now it's 'well, the sea has been rising for so many thousands of years'.
We have a bit more than a year before there is a major political election in this nation. We have one political party actively denying that AGW is real. Period. And we have a very strong El Nino, already we have had major flooding in Texas and the Carolina's. As well as a record drought for the West Coast, which has resulted in wild fires that have destroyed thousands of homes, and several towns were saved only through heroic efforts on the part of the firefighters. We had DC-10's laying down retardant on neighborhoods. There is a very good chance that the California drought will be ended with major storms. In other words, we have had major infrastructure destroyed by weather from coast to coast, and it looks like there is much more to come. But one major political party simply states this is not happening. It will be discussed extensively next year. You have made it political, and political it will be.