According to the World Meteorological Organization, 2015 is set to be the hottest year ever recorded. The U.N. weather agency says that global warming and El Nino—which resulted in elevated sea surface temperatures—are primarily to blame. WMO secretary-general Michael Jarraud said that the trend is concerning, noting that Greenhouse gas emissions hit a peak in 2014 at 143% higher than pre-industrial levels. Apparently 2015 was no improvement. In the Northern hemisphere, the global concentration of carbon dioxide levels during a 90-day period crossed the 400 parts per million threshold for the first time. But, America is not the only one to suffer these alarming new numbers. Asia and South America are also experiencing their hottest years on record while Europe is experiencing its second hottest. Experts say that El Nino could last well into 2016.