Polar bears’ abode is affected by the global warming. The North Pole and the Northern Canada is polar bear’s native land where is now gradually melting by the effect of global warming. I have watched the animal documentary, which polar bears have to migrate from their old abode because they have no glaciers to live on. The researchers from American Museum of Natural History in New York revealed the result by comparing between the same researches in 1968-1969; they were shocked at the result that glaciers, in North Pole, are melting increasingly at present. Then, the researcher from Polar Bears International, Conservative Polar Bears Organization, gave the result that many polar bears in Northern Canada were migrating from the glacier to the land. The effects of global warming are affecting the polar bears severely. (Ecology and Evolution Journal)