"A rise of more than 3.6 degrees Fahrenheit above pre-industrial levels would cause global effects -- such as massive species extinctions and melting of ice sheets"
here’s the rest, It's from the UN report that came out this week, there was all so an Issue of national geographic about 2 years ago on the subject.
http://www.washingtonpost.com/wp-dyn...020201754.html
Global warming, what ever the cause isn’t going to destroy the earth, it's just going to be really hard to live on it.