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OSLO - Last year was the second or third warmest on record behind 2016, and the hottest without an extra dose of heat caused by an El Niño event in the Pacific Ocean, the United Nations said on Thursday.
Average surface temperatures in 2017 were 2.0 Fahrenheit (1.1 degree Celsius) above pre-industrial times, creeping towards a 2.7F (1.5C) ceiling set as the most ambitious limit for global warming by almost 200 nations under the 2015 Paris climate agreement.Last year was indistinguishable, so far, from 2015 as the second or third warmest behind 2016, making 2017 "the warmest year without an El Niño," the UN's World Meteorological Organization (WMO) said.
Temperatures in both 2016 and 2015 were lifted by an El Niño, a natural event which can disrupt weather patterns worldwide every few years and releases heat from the Pacific Ocean into the atmosphere.
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