http://www.biofuelsreform.org/social-impact-of-biofuels.html
https://climate.nasa.gov/system/content_pages/main_images/1321_cc-vs-gw-vs-wx-768px.jpg
http://jenkinsplumbingandheating.townsquareinteractive.com/files/2014/04/biodiesel.jpghttp://www.greenfacts.org/en/biofuels/l-2/4-environmental-impacts.htm
http://www.greenfacts.org/en/biofuels/l-2/4-environmental-impacts.html