Originally Posted by cave76
...On average, it takes 3.5 to 6 gallons of water to produce one gallon of ethanol as compared to 1 to 2.5 to produce one gallon of gasoline."...
Sadly, it's not as simple as simply comparing water footprints. Consider what happens to the water used to grow the corn to make the ethanol. Either via irrigation or rain, plants are watered so they will grow. That water either evaporates and falls as rain again or ends up in the water table for reuse via irrigation systems.
There is as much water on the planet today as there ever was.