As winter approaches, polar bears in sub-arctic Canada begin to migrate off the tundra and head out onto the ice for the winter, where they can hunt for seals. However, climate change is delaying freeze-up, keeping the bears out on the tundra for longer - away from their main food source. US environment correspondent Suzanne Goldenberg talks to polar scientists ahead of a live Q&A from Churchill, Manitoba Continue reading...
Polar bears fight for survival as sea ice melts - video
5. listopadu 2013 15:30
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Celý článek: https://www.theguardian.com/environment/video/2013/nov/05/polar-bears-fight-for-survival-sea-ice-melts-video
Zdroj: The Guardian