Five Graphics That Show 2014's Record Heat

January 17, 2015 1:23 AM

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Earth's average surface temperature was the warmest since record-keeping began in 1880, according to NASA and the National Oceanic and Atmospheric Administration. December also was the warmest month ever recorded, and was among five months that set records, the agencies reported Friday.

Editor's note: Rhea Suh is president of the Natural Resources Defense Council and a former assistant secretary of the Interior. The opinions expressed in this commentary are solely those of the author.

Also read: Extreme heat forces flight cancellations in Southwest. Mercury expected to hit 120 in Phoenix

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