It is not cleaner really.  What we need is a REAL alternative and more fuel efficent engines.  Ehtanol is another way to up corn production.  It is a rip off.  They can make ethanol from grass or pine.  If you want to lower your grocery bill and make a difference in the environment dont eat meat.  You dont need it to be healthy and will be healthier without it.  My hope is the high prices of fuel will force people to drive less and auto makers to make more fuel efficient cars and the high prices of food will make people eat less animal flesh.  If more people ate less meat there would be a lot less heart diease, high cholesterol and diabetes.  Then we would use less drugs to control those conditions.  Those drugs would then not end up in our drinking water.  So, dont eat meat.  It does so much good for you and everyone else.