We've known for some time now that Greenland's ice sheet is melting at an alarming rate.
원문출처 : https://www.cnn.com/2020/09/30/weather/greenland-ice-sheet-melt-carbon-emissions-climate-change/index.html
원문출처 : https://www.cnn.com/2020/09/30/weather/greenland-ice-sheet-melt-carbon-emissions-climate-change/index.html