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'''Biofuel''' (pronounced bye-oh-FYOOL) is fuel made up of biological raw materials, such as [[wood]] or [[ethanol]]. This type of fuel is considered to be more friendly to the environment.<ref>http://www.alternative-energy-news.info/technology/biofuels/</ref>
'''Biofuel''' (pronounced bye-oh-FYOOL) is fuel made up of biological raw materials, such as [[wood]] or [[ethanol]]. This type of fuel is considered to be more friendly to the environment.<ref>http://www.alternative-energy-news.info/technology/biofuels/</ref>. The main type of biofuel available in America is corn-based ethanol. This is added to gasoline as an anti-knock compound, it replaces previously used compounds like tetramethyl lead and MTBE.
Some biotechnology companies are pursuing techniques to produce gasoline from algae<ref>http://www.sapphireenergy.com</ref>.
== References ==
== References ==
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