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Tweet Ray Pierrehumbert writes about President Obama’s speech in Slate One should be grateful for a president who is willing to stand up and declare—as President Obama did in his speech Tuesday announcing his long-awaited climate action plan —that global warming due to carbon dioxide emissions is a serious problem requiring serious measures, and that “We don’t have time for a meeting of the Flat Earth Society.†After all, as presidents go, we could have done much worse . President Obama is working under serious constraints in the form of a completely uncooperative Congress, and insofar as there is no real substitute for congressional action , there are limits to what he can be expected to do