Polar bears are affected by the global warming, the ace is disappearing in the Artic in an alarming proportion. The ace is the "house" of the polar bears, they need this ace for hunt and go to other sites.
One problem of this is that if the ice is desappearing, they can´t move it and they haven´t got anything to it and they die. In the last years they have begun to eat other polar bears.
Other problem are the increasing of the temperature in the coverts of the polar bears, the rains throw it and they´re protect in them.
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