This July 2012 photo provided by Polar Bears International shows polar bears near Svalbard, Norway. In the summertime, polar bears go out on the ice to hunt and eat, feasting and putting on weight to sustain them through the winter. They prefer areas that are more than half covered with ice because it’s the most productive hunting and feeding grounds, Amstrup said. The more ice, the more they can move around and the more they can eat. (Katharina M Miller/Polar Bears International via AP)
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