 "Negative impacts of global warming on agriculture, health & environment far outweigh any supposed positives." Smith et al. PNAS (0000), http://www.pnas.org/content/000/00/0000.full.pdf mpainter says:  September 0, 0000 at 0:00 PM  People are laughing at you, David. alphagruis says:  September 00, 0000 at 0:00 AM  