Ключевые слова: animal, animal species, animal welfare, arctic, bear, canada, climate, climate change, cold, earth, eco, ecosystem, endangered, environment, environmental protection, extinction, for, glacier, global, global warming, habitat, ice, mammal, mountain, nature, north, north pole, polar, polar bear, polar caps, predator, snow, snowmelt, south pole, temperatures, threat, threatened, warming, white, wild, wildlife, winter, zoo,