Energy Arithmetic I.
The US uses 140 billion gallons of gasoline per year. If 10% of this amount is displaced by ethanol, our yearly ethanol production would need to be at least 14 billion gallons per year. Our present ethanol production capacity is about 3.5 billion gallons per year! From an earlier discussion, an E85 fuel would require 8.5 times this production. Is large-scale ethanol replacement of gasoline possible?