For centuries, people have used yeasts and other microorganisms to ferment the sugar of various plants into ethanol. Producing fuel from biomass by fermentation is just an extension of this process, although a wider range of plant
material from sugar cane to wood fiber can be used. For instance, the waste from a wheat mill in New South Wales is
used to produce ethanol through fermentation. Ethanol is then mixed with diesel to produce diesehol, a product used by
trucks and buses in Australia