Nowadays, the effects of global warming are the biggest problem that causes the damage to nature and other animals. Because we all are in the globalization period, which human develops the economy system and technology increasingly in a few years. Although the fast progress is causing the big problem to our world, they do not mind and do not stop to generating the carbon dioxide in the atmosphere. Besides, Polar bears, living in North Pole, are the animal who are affected immensely by this problem and are facing the problem about their living. Moreover, many polar bears have to change their hunting behavior also. Then, they are risking the extinction. The development of humans is destroying the environment and other living things indirectly.