cozy heat said:Admittedly, corn is somewhat of a stop-gap. But even today, cellulose, trash, algae and other sources of ethanol are coming on line or in advanced research stages. Corn ethanol has allowed millions of flex-fuel vehicles to be produced and on the road...which means millions of drivers have a fuel choice and could switch instantaneously to what ever fuel is more economical.
Modern ethanol production has advanced far beyond the 'break even' energy input you quote. Plus, a lot of the energy used - as you say...coal, gas, hydro, etc...are energy sources from right here at home. So even though we may get 2 units of ethanol energy for 1 unit of input, 70% of that 1 unit input is also domestic energy which further leverages the effect.
Everyone mentions food prices. Many studies have shown ethanol actually keeps food prices lower by reducing the cost of fuel needed for transport and processing of those foods. But what could ethanol actually do? A 16 ounce box of cornflakes is $3.29 at the local store. Even today, with grain speculation running wild, corn is running about 5.60/bushel or 10 cents a pound. So the other $3.19 is what?? Manufacturing, marketing, distribution, profit?!?! Even if the price of corn tripled, there would only be about 30 cents worth of corn in a box of corn flakes.
The price of corn affects a lot more than the price of corn flakes. First, it is a basis for many animal feeds. As it usually requires five to ten times the feed weight to produce the same weight increase in livestock, large increases in corn prices are likely to drastically increase meat prices. Second, one would expect that if corn is fetching very high prices, farmland growing other types of food crops would begin producing corn . This would lead to general increase agricultural products. Finally, there are many parts of the world that are extremely poor and are reliant on relatively low prices of commodity crops to feed themselves. Even if you don't think its necessary for the US to ensure these people are fed, populations that can't feed themselves tend to be very unstable politically and can cause problems for the United States abroad.
Again, the new ethanol regulations just seem like a giveaway to big agriculture. Increasing the amount of ethanol this country uses is not likely to lead to any environmental effects and most likely harm low income people around the world.