FILE PHOTO: A southeast Greenland polar bear on glacier, or freshwater, ice is seen in this handout photograph taken in September 2016. Thomas W. Johansen/NASA Oceans Melting Greenland/Handout via REUTERS
FILE PHOTO: A southeast Greenland polar bear on glacier, or freshwater, ice is seen in this handout photograph taken in September 2016. Thomas W. Johansen/NASA Oceans Melting Greenland/Handout via REUTERS