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.
參考: Wikipedia
Owing to global warming
that is the rising temperature
makes the global evapotrpiration 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. 主要系唔夠野食同埋冇地方訓 hibernation－＞ 冬眠
參考: 補習學番黎ge～
Reasons for Endangerment One of the most mon 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 bees 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 bee extinct.
參考: neyture.info/teachered/endanger/reports/mammals/bear~polar/bear~polar