Biomass

Biomass: "three primary ways that ethanol can be used as a transportation fuel:

As a blend of 10 percent ethanol with ninety percent gasoline known as E10 or gasohol (which you now see at most gas stations)
As a component of reformulated gasoline, directly and/or as ethyl tertiary butyl ether (ETBE), or
A mixture called E-85 that consists of 85 percent denatured ethanol blended with 15 percent gasoline; E-85 does not burn well in conventional vehicles, but flexible-fuel vehicles (FFV) are designed to run on all blends up to 85 percent.
Liquid ethanol can be used as a fuel when blended with gasoline or when in its original state. Ethanol can be used to increase octane levels, decrease engine emissions, and can extend the supply of gasoline. About 1.6 billion gallons of ethanol are produced annually in the United States. Each bushel of corn processed yields 2-4 gallons of ethanol "