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director, James Hansen, has asserted that nine of the 10 warmest years in history have occurred since 1995, with 1998 the warmest.

Not so hot air →

On Jan. 19, 2009, James Hansen, climate expert who until last year was head of NASA's Goddard Institute of Space Studies, firmly declared that President Obama "has only four years to save the Earth" — which you might have noticed he failed to do.

RAHN: The global-warming apocalypses that didn't happen →