[지구의맥박] '어린 얼음'만 늘어난다...위기의 북극 해빙 / YTN YTN 0 48 08.20 03:16 https://www.youtube.com/watch?v=SRPE9jp-bIg + 12 https://www.youtube.com/feeds/videos.xml?channel_id=UChlgI3UHCOnwUGzWz… + 7 [지구의맥박] '어린 얼음'만 늘어난다...위기의 북극 해빙 / YTN