References
http://biofuelsassociation.com.au/wp-content/uploads/fermentation.png/
http://www.mpoweruk.com/images/biomass_fuel.gif
http://www.mpoweruk.com/biofuels.htm http://biofuelsassociation.com.au/biofuels/ethanol/how-is-ethanol-made/
http://biofuelsassociation.com.au/wp-content/uploads/Production-process.png
http://biofuel.org.uk/how-are-biofuels-produced.html
http://hyperphysics.phy-astr.gsu.edu/hbase/Biology/ferment.html
https://en.wikipedia.org/wiki/Biodiesel_production#/media/File:Transesterification_of_triglycerides_with_ethanol.png
http://biofuel.org.uk/how-do-biofuels-burn.html
http://www.biofuelsreform.org/social-impact-of-biofuels.html
Christian N, Joseph BN. 2009. Our Energy Future: Resources, Alternatives, and the Environment. New Jersey, US: John Wiley& Sons, Inc.