News of the WeekClimate Change

Record U.S. Warmth of 2006 Was Part Natural, Part Greenhouse

Science  13 Jul 2007:
Vol. 317, Issue 5835, pp. 182-183
DOI: 10.1126/science.317.5835.182a

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Four climate scientists at the National Oceanic and Atmospheric Administration calculate that the greenhouse was behind more than half of last year�s record-breaking warmth across the contiguous United States.