BBC: 2010 was the warmest year since global temperature records began in 1850.
The World Meteorological Organization (WMO) concludes 2010 was 0.53C warmer than the average for the period 1961-90 - a period commonly used as a baseline.
It comes in just ahead of 1998 and 2005 - but the margins of uncertainty in measurements means the three years are statistically identical.
The WMO analysis combines data from three leading research agencies, and is regarded as the most authoritative.
The three......
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2010 sets record on global warmth
Posted by Washington Post: Juliet Eilperin on January 20th, 2011
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