The 'Saab E85' ethanol is another example of the European car industry moving to meet market expectations. A third biological fuel is biogas, which is methane with a biological origin. The biogas solution is often overlooked, particularly in its ..... Parliamentary Office of Science and Technology (POST), 'Prospects for a Hydrogen. Economy', postnote, no. 186, October 2002, viewed 30 June 2009, 75. US Department of Energy (DOE), ...
