RT @YaleE360: Ice losses from 1994 to 2017 are estimated at: 7.6 trillion metric tons of Arctic sea ice, 6.5 trillion tons from Antarctic ice shelves, 6.1 trillion tons from mountain glaciers, and 3.8 trillion tons from the Greenland ice sheet. https://t.co/ZnbvCpsgrt https://t.co/3LoqPrMt7l