[oberstein]

I'm a fan of: http://stanford.edu/~moore/Boon_To_Man.html

Near the end: "If mankind had to choose between a warmer or a cooler climate, humans, most other animals and, after adjustment, most plants would be better off with higher temperatures. Not all animals or plants would prosper under these conditions; many are adapted to the current weather and might have difficulty making the transition. Society might wish to help natural systems and various species adapt to warmer temperatures (or cooler, should that occur). Whether the climate will warm is far from certain; that it will change is unquestionable."