greenland where the arctic is warming twice as fast as anywhere else on the planet. that heat melting glaciers, sea ice and greenland s ice sheet, which lost 12.5 billion tons of ice in a single day. something scientists didn t expect to happen for at least another 50 years. the extent of ice melt here in greenland will actually help determine just how high sea levels will rise. all this ice that s fallen off has been since we ve gotten here. we ve been hearing it and seeing it falling off and it s going into the ocean. what happens? we are on the first step of a domino effect. because what happens in the arctic doesn t stay in the arctic. we ve only had about 7 inches of sea rise globally in the last century. doesn t sound like much, but it s already profoundly shifting the frequency and intensity of