Last year was ninth-warmest in more than 160 years

Last year was the ninth-warmest since record-keeping began in 1850, despite the cooling effect of the weather pattern called La Nina, the World Meteorological Organisation says.

The UN’s weather agency says this marks the 27th year in a row the global average temperature – 58 degrees Fahrenheit (14.45 degrees Celsius) in 2012 - surpassed the 1961-1990 average.