The International Union for Conservation of Nature whose headquarters are based in Switzerland, has listed global warming as the largest threat to the world's largest land predator; the polar bear.
The reason the polar bear has become the symbol of global warming is because it is the main factor contributing to the melting sea ice, a platform from which the polar bear hunts during the winter months. The early melting of the ice causes a shorter hunting season for the animals who rely on this winter hunt to sustain them through the rest of the year. The polar bear fasts or eats very little over the summer and must regain their body condition and fat levels when the sea ice forms to allow them access to their favoured food - the ringed seals and their pups. ... continue below the picture...
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Polar Bear, Ursus maritimus, in the Churchill Wildlife Management Area, Hudson Bay, Churchill, Manitoba, Canada.