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>>>The same corn cannot be used for food and fuel.<<<

That is pure, 100% bullsh*t.

WHAT'S IN A BUSHEL OF CORN?

Each bushel of corn can produce up to 2.5 gallons of ethanol fuel.  Only the 
starch from the corn is used to make ethanol.  Most of the substance of the 
corn kernel remains, leaving the protein and valuable co-products to be used
in the production of food for people, livestock feed, and various chemicals.  
For example, that same bushel of corn (56 lbs.) used in ethanol manufacturing 
can also produce the following:

The wet-milling process:		The dry-milling process:
31.5 pounds of starch		10 one-lb. boxes of cereal
or		and
33 lbs. of sweetner		15 lbs. of brewer grits (enough for 1 gal. of beer)
or		and
2.5 gal. fuel ethanol		10 eight oz. packages of Cheese Curls
and		and
12.4 lbs. of 21% protein feed		1 lb. of pancake mix
and		and
3.0 lbs. of 60% gluten meal		22 lbs. of hominy feed for livestock
and		and
1.5 lbs. of corn oil		0.7 lbs. of corn oil
and		and
17 lbs. of carbon dioxide		17 lbs. of carbon dioxide

The corn oil is used in producing food for human consumption.  For example, 
1.5 lbs of corn oil from a bushel of corn is equivalent to 2 lbs of margarine.  
The 21% protein feed is used in making high protein livestock feed.  The 
carbon dioxide is used as a refrigerant, in carbonated beverages, to help 
vegetable crops to grow more rapidly in greenhouses, and to flush oil wells.  
Only the starch of the corn (carbon, hydrogen, and oxygen) is used to make ethanol.