Ethanol has its problems, we produce less food (corn and wheat) to begin with. Brazil has done a good job producing it with grasses, some swamp grasses might be better in US.
Erik As many of you know I am skeptical that CO2 is a significant cause of
global warming, but assuming it is, the following is interesting:
Does Ethanol Pollute More than Gasoline?
An Expert Reveals the Facts:
By now you may have heard of the economic questions regarding using corn for ethanol production, but less attention has been paid to the environmental impact of using ethanol as an alternative to gasoline. Is ethanol more of a pollutant than gasoline? Surprisingly, the science says yes. According to our Expert, who holds a PhD in Biochemical Engineering, a Master$B!G(Bs degree in Chemical Engineering, and has over 40 years experience performing biotechnology, bioengineering, and bioprocess research, both ethanol and gasoline deliver the same amount of carbon dioxide (CO2) into the atmosphere per gallon consumed. However, when compared on a per mile driven basis, burning ethanol actually produces 54% more CO2 as global warming pollutant than gasoline due to the fact that ethanol has lower fuel efficiency. For the science buffs out there, the energy production produced by burning materials is proportional to the molecules of oxygen used. Here are the chemical formulas for the energy produced by burning octane via gasoline and by burning glucose via ethanol.
Octane (n-dodecane): C12H26 + 18.5 O2 $B"*(B 12 CO2 + 13 H2O 18.5 x energy units.
Glucose via ethanol: Glucose 2 C6H12O6 $B"*(B 4 CO2 + 4 C2H5OH Ethanol: 4 C2H5OH + 12 O2 $B"*(B 8 CO2 + 12 H2O ________________________________________ 2 C6H12O6 + 12 O2 $B"*(B 12 CO2 + 12 H2O 12.0 x energy units
What is the scientific conclusion? To reduce CO2 as a global warming pollutant, stop using ethanol as an automobile fuel substitute!
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