2015 was a record-setting year, with average temperatures more than 1ºC above pre-industrial levels – halfway to the 2ºC limit that world leaders have pledged not to breach. Carbon dioxide emissions rose by their largest recorded year-on-year jump. Other indicators, including sea surface temperatures and arctic sea ice coverage, showed alarming deterioration. These grim trends have continued into 2016, with month after month of record-breaking temperatures
