Global warming is one of the biggest issues facing our wildlife and planet. Some scientist say that the rising tempatures can cause around 20-30 percent of the earths extinction of plants and animals between now and 2050. Global warming can also cuase extintion of polar bears in our lifetime. The rising tempature is already melting the ice which makes it harder for them to hunt for food. Some are even resorting to cannibalism.
http://www.theliteracysite.com/clickToGive/campaign.faces?siteId=4&campaign=GlobalWarming