Why are polerbears endangerd?

What are the 5 main drivers of habitat loss? What is the size of a takahe? Are pandas better off in the wild or in captivity? Are carpet snakes endanged? What are factors that keep humans off the endangered species? What is the antonym for forewarn? Why are Green Turtles endangered? Is there any Abalone endangered species? Example of index of a book? What are the three levels of risk? What is a weakness of traditional food webs when they are applied to complex ecological problems? What are some conservation efforts in the biome taiga? Who is killing the jaguars? What are some adjectives to describe a dark forest? Do other hawks help catch their prey? How are people helping to keep the endangered animal fossa safe? What is the synonym of the word vigilant? What would happen if the taiga were gone? What are the most endangered species called? What causes a human foot to turn black?