Originally Posted By: PandaBear
addyguy,
The problem with corn ethanol is that you need diesel and fertilizer to grow, and the amount you consume cost more than the amount of energy you get back, even when you consider not having to reduce food supply.
No. Estimates of net energy return range from a low of 6% to a high of 67%, with 30% being a commonly agreed on figure. The only way to find a negative energy return for corn based ethanol is to assume that one of the end products (distillers grain) is simply thrown away instead of being turned into livestock feed.
http://en.wikipedia.org/wiki/Ethanol_fuel_energy_balance
addyguy,
The problem with corn ethanol is that you need diesel and fertilizer to grow, and the amount you consume cost more than the amount of energy you get back, even when you consider not having to reduce food supply.
No. Estimates of net energy return range from a low of 6% to a high of 67%, with 30% being a commonly agreed on figure. The only way to find a negative energy return for corn based ethanol is to assume that one of the end products (distillers grain) is simply thrown away instead of being turned into livestock feed.
http://en.wikipedia.org/wiki/Ethanol_fuel_energy_balance