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2015 Will Be Warmest Year Since Records Were First Kept 135 Years Ago

The average global surface temperature is running 1.7 degrees Fahrenheit warmer than the 135-year average, according to NOAA.
A man jogs during a warm day in Central Park, New York December 25, 2015. Much of the U.S. East Coast saw record high temperatures on Christmas Day.EDUARDO MUNOZ / Reuters
CNBC