1. National energy conservation policy Act, public law 95–619. 95th congress (1977–78);Congress,1978
2. Energy policy Act of 2005, public law 109–58;Congress,2005
3. Energy independence and security Act of 2007. 110th congress, 1st session;Congress,2007
4. Ethanol can contribute to energy and environmental goals;Farrell;Science,2006
5. Use of U.S. Croplands for biofuels increases greenhouse Gases through emissions from land-use change;Searchinger;Science,2008