Coal Ethanol Fossil fuel Hybrid vehicle Natural gas Petroleum Photosynthesis
Notes
1. ↑ "Green Dream" Backed by MPS., Eastern Daily Press, (January 2003) Globeco
biodegradable bio-diesel. Retrieved December 13, 2008.
2. ↑ Ethenol facts. Australian Friends of Ethanol. Retrieved December 13, 2008.
3. ↑ Energy Arizona. Retrieved December
13, 2008.
4. ↑ EPA. Retrieved December 13, 2008.
5. ↑ Christopher Leonard, Associated Press, 4/17/2008, make energy from farm waste. USA Today. Retrieved December 13, 2008.
6. ↑ . . Retrieved
December 13, 2008.
7. ↑ European Environment Agency. 2006. How much bioenergy can Europe produce
without harming the environment? EEA Report no. 7.
8. ↑ IPCC Third Assessment Report. UNEP. Retrieved December 13, 2008.
9. ↑ EPA. Retrieved December 13, 2008.
10. ↑ Frank Keppler, John T. G. Hamilton, Marc Bra, and Thomas Röckmann. 2006. Methane
emissions from terrestrial plants under aerobic conditions. Nature 439:187–191.
11. ↑ Marla Toncray, 2008. Construction of landfill power plant has begun. The Ledger
Independent. Retrieved December 13, 2008.
12. ↑ ESA.United Nations. Retrieved December 13, 2008.
13. ↑ ADM Biodiesel: Hamburg, Leer, Mainz. biodiesel.de. Retrieved December 13, 2008.
14. ↑ Biodiesel Filling Stations, UK. Retrieved
December 13, 2008.
15. ↑ Will Thurmond, Biodiesel poised for "explosive" growth in the next ten years, futurist . Futurist (magazine), 41 (4)(July-August 2007) Retrieved December 13, 2008.
16. ↑ Main Page. Butyl Fuel, LLC. Retrieved December 13, 2008.
17. ↑ Andrew Bounds, September 10, 2007.
Financial Times. Retrieved December 13, 2008.
18. ↑ N. Brinkman, et al. 2005. Well-to-Wheels Analysis of Advanced/Vehicle Systems.
19. ↑ A.E. Farrell, et al. 2006. Ethanol can Contribute to Energy and Environmental Goals.
Science 311:506-508.
20. ↑ R. Hammerschlag, 2006. Ethanol's Energy Return on Investment: A Survey of the
Literature 1999-Present. Environ. Sci. Technol. 40:1744-1750.