Millions of trucks and buses can be converted to run on Bio-Diesel. Ethanol and Flex Engines are currently being phased into Auto Production. Ethanol mixes do not burn as efficiently as pure gasoline. It takes approximately twice the amount of ethanol, compared to gasoline, to travel the same distance. Better Auto efficiency standards are clearly needed in the U.S. Diesel Autos in Europe can get as much as 70 MPG, but their admission into the US Auto market is hindered by Environmentalists. Ironically, California's emission standards are preventing them from entering our Market. The following fuels are made from renewable resources. Soybeans and corn that are used to make biodiesel and ethanol can be grown on farms across the country, however they require a lot of water, and they offset our food supply. Hemp has been proven to be more drought resistance for creating biodiesel. A Type of biodiesel called Hempoline has been tested to run well in all diesel cars and trucks. The use of Hemp to replace our current diesel is economically beneficial in every way. Plus, Hemp emits 90% fewer greenhouse emissions than diesel or gas. Additional forms of Bio-fuels are being studied. MIT is conducting research into the farming of Algae. Estimates suggest that we could produce 10 times more fuel from Algae then corn. Also, plans are under way to make ethanol manufacturing even more effective by using cellulose in the production phase. The implications of this are enormous, since it will allow any plant material to be converted into ethanol. Soon your yard clippings could be converted into fuel.