"About Us | Union of Concerned Scientists." UCS | Union of Concerned Scientists. Web. 11 Apr.
2011.
Campbell, Colin J.. "About Peak Oil | ASPO International | The Association for the Study of
Peak Oil and Gas." ASPO International | The Association for the Study of Peak Oil and Gas. Web. 11 Apr. 2011.
"Ethanol Fuel History." Fuel Testers - Home - E10 Gas. MLR - Solutions, 2006. Web. 11 Apr.
2011.
Pimentel, David. “Energy and Dollar Costs of Ethanol Production with Corn.” Hubbert
Center Newsletter April. 1998: 1–8. Web.
Romm, Joseph. "Hydrogen fuel cell technology." Culture Change. Sustainable Energy Institute,
n.d. Web. 11 Apr. 2011.
Trainer, Ted. “Can Renewable Energy Sources Sustain Affluent Society?” Energy Policy Vol. 23. No. 12, 1995. 1009:26. Web.
U.S. Energy Information Administration. "How much of our electricity is generated from
renewable sources?." U.S. Energy Information Administration. EIA, Web. 11 Apr. 2011.
Youngquist, Walter. "Alternative Energy Sources." Hubbert Peak. Oct. 2000. Web. 20 Feb.
2011.