The science doesn't predict a disaster. That is the claim of the political movement. There is no scientific consensus on "disaster."
He deals with this in his article. Just for example, he notes how the IPCC gives a predicted range or temperatures. The policy makers like Gore and Kerry go straight to the top of the range, and push policy based on the top temperatures alone. But, if you take the low end of the range, then disaster is not indicated.
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