Ice levels at the North Pole have shrunk to their second lowest level ever, scientists say -- and there could be worse to come.
원문출처 : http://www.cnn.com/2016/09/16/weather/arctic-sea-ice-shrinking/index.html
원문출처 : http://www.cnn.com/2016/09/16/weather/arctic-sea-ice-shrinking/index.html