the warmest decade was decade since records began . 2005 was warmest year of all time , 2008 coolest in 2000 to 2009 . Global temperatures have risen about 0.8 degrees Celsius since decade .
2000 to 2009 was the warmest decade since records began . 2005 was warmest year of all time , 2008 coolest in decade . Global temperatures have risen 0.8 degrees Celsius since 1880 .