Cause of Endangerment
Global Warming - Less land, climate change and more sea(biotic)
Scarcity of food - Less hunting ares and other populations dying off(biotic)
They are classified as vulnerable to endangerment
There are 20-25,000 polar bears worldwide
Direct count methods, such as strip counts, aerial counts or vantage point counts, can provide accurate estimate
http://topics.nytimes.com/topics/reference/timestopics/subjects/p/polar_bears/index.html
Scarcity of food - Less hunting ares and other populations dying off(biotic)
They are classified as vulnerable to endangerment
There are 20-25,000 polar bears worldwide
Direct count methods, such as strip counts, aerial counts or vantage point counts, can provide accurate estimate
http://topics.nytimes.com/topics/reference/timestopics/subjects/p/polar_bears/index.html