Polar bears are from the cold climate. They are brought here to Singapore, and are placed in tropical climate. However, they still do need the cold climate and can't not adapt to our weather. The enclosure for these bears at the Singapore Zoo are not air-conditioned. Making this enclosure air-conditioned, it will give them a sense of a cold-climate and they would feel no different. We can then see the bears being more healthy and not dreadful like how they are now.