evidence: Stunning new data indicates El Nino drove record highs in global temperatures suggesting rise may not be down to man-made emissions - Global average temperatures over land have plummeted by more than 1C - Comes amid mounting evidence run of record temperatures about to end - The fall, revealed by Nasa satellites, has been caused by the end of El Nino [...] Others have argued that the records were caused by El Nino, a complex natural phenomenon that takes place every few years, and has nothing to do with greenhouse gas emissions by humans. [...] Big El Ninos always have an immense impact on world weather, triggering higher than normal temperatures over huge swathes of the world. The 2015-16 El Nino was probably the strongest since accurate measurements began, with the water up to 3C warmer than usual.