21. ↑ .
Retrieved December 13, 2008.
22. ↑ Home Page. Hydrogen Solar. Retrieved December 13, 2008.
23. ↑ . Green Fuel Online. Retrieved December 13, 2008.
24. ↑ Fill her up please, and make it myco-diesel. AFP, Nov 4, 2008. Retrieved December 13,
2008.
25. ↑ 25.025.1 Eviana Hartman, January 3, 2008. Washington Post. Retrieved December 13, 2008.
26. ↑ AutoblogGreen.
Retrieved December 13, 2008.
27. ↑ Craig Venter: On the verge of creating synthetic life. TED Talk. Retrieved December 13,
2008.
28. ↑ IEA bioenergy. Retrieved December 13, 2008.
29. ↑ United Nations Department
of Public Information. Retrieved December 13, 2008.
References
Drapcho, Caye, Nhuan Phú Nghiêm, and Terry Walker. 2008. Biofuels Engineering Process Technology. New York, NY: McGraw-Hill. ISBN 0071487492. Farrell, A.E. et al. 2006. Ethanol can Contribute to Energy and Environmental Goals. Science 311:506-508. Hammerschlag, R. 2006. Ethanol's Energy Return on Investment: A Survey of the Literature 1999-Present. Environ. Sci. Technol. 40:1744-1750. Mousdale, David M. 2008. Biofuels: Biotechnology, Chemistry, and Sustainable Development. Boca Raton, FL: CRC Press. ISBN 1420051245. Nag, Ahindra. 2007. Biofuels Refining and Performance. New York, NY: McGraw-Hill.
ISBN 0071489703.
External links
Biomass and Biofuels. Open Directory Project. Retrieved December 13, 2008. (EERE). Retrieved December 13, 2008. - a wiki on biofuels and related subjects, including bioenergy sustainability. Retrieved December 13, 2008. —Natural gas requires the least water
to produce energy, some biofuels the most, according to a new study. Retrieved December 13, 2008.
- European Union Biofuels
Standardization. Retrieved December 13, 2008.
.
Retrieved December 13, 2008.