The United Nations weather agency says the past 10 years were likely the hottest decade since scientists began keeping records. In a new report, the World Meteorological Organization, or WMO, blames the rising temperatures mainly on greenhouse gases produced by human activities. “Average temperatures for the five-year, 2015-to-2019 and 10-year, 2010-to-2019 periods are almost certain to be the highest on record,” the WMO said. The report predicted that 2019 would become the second- or third-warmest year on record. Final temperature measurements will not be available for several months. Petteri Taalas is the Secretary-General of the WMO. He says severe heatwaves and floods that used to happen about once every hundred years have become regular events.