北極熊瀕臨絕種的原因

暖化危機鋪天蓋地而來，北極冰層逐漸融化，嚴重破壞北極生態。現在美國也正視溫室效應，把北極熊列入瀕臨絕種動物的保護名單。 冰天雪地的北極，原本是北極熊的樂土，不過如今冰層急速溶化，讓北極熊難得一塊立足之地。

Scientists and climatologists believe that the projected decreases in the polar sea ice due to global warming will have a significant negative impact or even lead to extinction of this species within this century.[1][3]

An alternative theory downplays the effect climate change is having on the polar bear and hypothesizes that the species may survive through adaptation.

Owing to global warming, that is the rising temperature, makes the global evapotranspiration rate rises. Since then, the sea level rises and the ice caps in the Arctic tudra melts. As pack-ice decreases, polar bears cannot swim far to look for food(ie. insufficient food for polar bear). They will soon die of hunger.
On the other hand, wet snow limits drysites for polar bears for hibernation, thus the hibernation period is shortened.

主要係唔夠野食同埋冇地方訓
hibernation－＞　冬眠

Reasons for Endangerment
One of the most common reasons the Polar Bear is endangered is because people are destroying the Polar Bear's habitat. People are aware of what happens to the animals that live in that habitat, but do not care if that animal becomes extinct. I think there should be a law that if there are less than 1,000 animals of the same spieces in one area, there could be no construction.

I don't know how many Polar Bears are alive today but there must be too few, to put them on the endangered spieces list. I hope they don't become extinct.