TitleWMO statement on the state of the global climate in 2017
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Global mean temperatures in 2017 were 1.1 °C ± 0.1 °C above pre-industrial levels. Whilst 2017 was a cooler year than the record-setting 2016, it was still one of the three warmest years on record, and the warmest not influenced by an El Niño event. The average global temperature for 2013-2017 is close to 1 °C above that for 1850-1900 and is also the highest five-year average on record. The world also continued to see rising sea levels, with some acceleration, and increasing concentrations of greenhouse gases. The cryosphere continued its contraction, with Arctic and Antarctic sea ice shrinking. Foreword -- Executive summary -- Key climate indicators -- Climate risks and related impacts Vector-borne diseases: Zika in the Americas.