Global average temperatures in 2015 will be the warmest on record, the secretary-general of the World Meteorological Organization (WMO) said at a news conference in Geneva on Wednesday. Michel Jarraud made the announcement when introducing the findings of a WMO report just days before international negotiations on climate change are set to begin in Paris. Climate change has surpassed “symbolic thresholds”, the WMO report warns, with global surface temperatures set to breach a one degree […]