The 2000-2009 decade is on track to be the hottest since records began in 1850, according to data released by the World Meteorological Organization, the U.N.'s weather agency, in December 2009. The second warmest decade was the 1990s. Only the United States and Canada experienced cooler conditions than average in 2009 although Alaska had the second-warmest July on record. In central Africa and southern Asia, 2009 will probably be the warmest year, but overall, 2009 will "be about the fifth-warmest year on record," said Michel Jarraud, WMO secretary-general.
To read the WMO press release, click here: