By the reckoning of the three main agencies that track global temperature, 2015 has so far been the warmest year in more than a century. Coming immediately after the hottest year on record, the ranking serves as a reminder of how much the globe’s overall temperature has risen thanks to the ever-growing amounts of greenhouse gases in the atmosphere.
With the year only a quarter through, it’s difficult to say definitively how 2015 as a whole will turn out. But with an El Niño event currently in place that could help keep temperatures at record or near-record levels for the remainder of the year, 2015 may be poised to eclipse 2014’s newly minted ...
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