Polar bears face uncertain future

Polar bears are facing an uncertain future, due to global warming.

Their icy homes are melting away beneath them, and their population in the wild is gradually depleting.

Aviemore is one of Britain's coldest places perfect for a polar bear like Mercedes.

She moved here four months ago, after 25-years in a small enclosure at an Edinburgh Zoo.

Now she's lapping up the Highland winter rolling around in the snow and sniffing out her environment.

Polar bears are facing an uncertain future, due to global warming.