'We know they aren't feeding': fears for polar bears over shrinking Arctic ice

Expert Steven Amstrup says 'the longer the sea ice is gone from the productive zone the tougher it is on the bears'

The loss of Arctic ice from glaciers, polar land and sea is declining faster than many scientists expected, as the Intergovernmental Panel on Climate Change's (IPCC) report on oceans and the cryosphere said this week.

That's bad news for polar bear populations, a top expert involved in field studies on the endangered animals has told the Guardian.