Photo: Earth Hotter Now Than in Past 2,000 Years, Study Says



Kids cool off from a heat wave with the help of a fire hydrant in New York City on June 10, 2008.

The planet is hotter now than it has been for the past 2,000 years, says a September 2008 study that adds to evidence that global warming is not due mainly to natural variability.

Photograph by Mario Tama/Getty Images


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