The World Meterological Organization’s (WMO) statement on the status of the global climate says 2013 was one of the warmest years on the earth since the late 1800s when global recordkeeping began. The Status of the Climate Report also includes a case study of Australia’s record 2012-2013 summer temperatures that compares climate model simulations with and without human factors and concludes that the record heat would have been “impossible without human contributions of heat-trapping gases.”