Corn is the source for 98 percent of all ethanol now, but that could change.
As the demand for alternative fuels grows to help break the nation's dependance on foreign oil, more plants are being built across the country to use something other than corn to produce ethanol.
Wood chips will be used in the first commercial-scale ethanol plant of its kind being built in Georgia. A Louisiana plant will produce 1.4 million gallons of ethanol using sugar-cane waste. Tennessee is researching the use of prairie grasses into auto fuel and New York has awarded $25 million to two companies to produce ethanol from wood chips and paper waste.
Read more about the different ethanol sources at stateline.org.