Ethanol is alcohol made from plants and grain. In Nebraska, ethanol is made from corn. In Brazil, sugar cane is the primary source of ethanol. Each acre of 115 bushel corn makes 288 gallons of ethanol. An acre of sugar cane produces about 830 gallons of ethanol.
Ethanol is made from renewable resources.
Gasoline is made from non-renewable petroleum. There is only so much oil in the ground. But we can grow more corn and sugar cane every year. It's easy to see that the more ethanol we use in our gasoline, the less we rely on fossil fuels. And the closer we get to cleaning up our air.