Polar bears live in a very specific habitat. They need the cold, snow and ice of the polar regions. That is why they are called "polar bears" and not "summer bears." Polar bears have very few natural threats in the polar region. Polar bears are on the top of the food chain and there are no other animals in the north that will threaten the polar bears. So why are the polar bears now on the threatened/endangered species list?
Polar bears are not threatened because of other animals or because they are being hunted too much. Polar bears are threatened as a direct effect on how we as humans treat the earth and the environment. People have begun to take the Earth for granted. They have treated it as thought it is indestructible. When if fact, the earth is destructible, and we are destroying it.
Polar bears live in the arctic, and like many other places on earth, the has had scientists who are learning about what is happening to that specific region of the earth. The scientists have been doing deep core . This is where they drill a hole down into the ice and pull out a core of ice. In this core of ice the scientists can get very specific information about the weather, the atmosphere, and the temperature for a specific time period. These core tests can determine facts from 420,000 years.
Now you may wonder what all of this has to do with the polar bears. The polar bears live in a very sensitive environment. The arctic region is made of snow and ice. Snow and ice is what the polar bears depend on for their survival. The "Greenhouse Effect" warms the earth, and therefore, melts the precious snow and ice that the polar bears need for survival.
So it is easy to deduce from this, that we, humans, are the cause of the polar bears being threatened. We are slowly killing the planet and most of us are oblivious to it. Global warming can be slowed down, the polar bears do have a chance.