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“Meltwater flows across the top of the Greenland ice sheet southeast of Ilulissat, which has been sullied by cryoconite, or ash and soot. The presence of cryoconite deposited on top of the ice sheet triples the melt rate” [2048×1367] Photo by Daniel Beltrá via /r/EarthPorn http://bit.ly/1qDZARZ
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