Wait, what?!: Revkin wrote in Aug. 2000 that James Hansen fingered other emissions, NOT CO2, for the warming seen in recent decades

Study Proposes New Strategy to Stem Global Warming - New York Times

An influential expert on global warming who for nearly 20 years has pressed countries to cut emissions of carbon dioxide and other heat-trapping gases now says the emphasis on carbon dioxide may be misplaced. Instead, he and a team of scientists have concluded that the quickest way to slow warming is to cut other such greenhouse gases first.
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The expert, Dr. James E. Hansen, and his colleagues conclude in a new analysis that the warming seen in recent decades has been caused mainly by other heat-trapping emissions -- methane, chlorofluorocarbons, black particles of diesel and coal soot and compounds that create the ozone in smog -- which are easier to control than carbon dioxide, with many of them already on the decline.
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''The prospects for having a modest climate impact instead of a disastrous one are quite good, I think,'' Dr. Hansen said in an interview.