Below are some links you might want to visit:

http://www.climatehotmap.org/namerica.html

This one is on biofuels:
http://www.popularmechanics.com/scie...h/2690341.html

And this one is on global warming itself:

http://auto.howstuffworks.com/global-warming.htm



Be informed these are long articles. But very interesting and informative