Even scientists who accept the conventional scientific treatment of the subject by the U.N. International Panel on Climate Change increasingly question just how much it would help to curb emissions or to radically redistribute wealth, as activists like Klein urge us to do. Bjørn Lomborg, director of the Copenhagen Consensus Center, told me that all of the carbon-reduction targets advocated by the U.N. or the European Union would result in imperceptible differences in temperature, at enormous cost. “We would be far better off and richer if we did simple things like painting roofs in hot climates white and investing in new technologies that could help us adapt to any change that is coming,” he says. Even the U.N.’s own climate panel admits that so far, climate change hasn’t included any increase in the frequency or intensity of so-called extreme weather.

At the Heartland Institute’s Ninth International Conference on Climate Change last July, I ran into scientist after scientist who felt that the debate was finally going against the climate extremists. Several noted that the conference’s organizers were on the offense and gaining real ground.