I'm shocked, shocked I tell you! /sarcasm off
Bjørn Lomborg wrote an excellent book, full of documented fact. If you haven't read it obtain it and do so!
His critics are in fact the very "scientists" criticized in Bjorn's work. His use of valid science (and math) to show global warming and other pet science concerns of the left to be unsubstantiated. With respect to global warming, the models used assume global warming and then attempt to pinpoint what will happen. True scientific models hypothesize what may be happening and try to show measurable events that can be used to validate the model. It will take many years to validate global warming. In the meantime, Bjorn shows that it won't be as big a deal as the critics make out.