Originally Posted by Dahon.Steve
...It doesn't take much food to keep a human alive but telling Americans to give up their motorcars is a different story!
At 30 miles per gallon, driving a car 3 miles uses as much chemical energy as a person needs to eat in one day.
Not really an ethical problem I guess, until you start talking about running cars on biodiesel and ethanol made from food crops. If you do that, you are in some sense depriving someone, somewhere, of a day's worth of food for every three miles you drive.