it does not "require" any use of petroleum from OPEC to produce ethanol.....the bulk of electricity in the US comes from coal, which is not imported from OPEC nations, most of the rest of it comes from natural gas, which is not imported from OPEC nations....the balance comes from nuclear, wind, solar, and hydro-electricity.....none of which involve imports from OPEC nations.....
the use of corn for ethanol has no impact on beef or dairy products, since they can be fed brewer's mash.....it is true that pork cannot digest brewer's mash, but apart from that there is no reason to think ethanol increases the cost of food.....in truth, the cost of the petroleum products consumed in shipping a pound of beef contributes as much to the cost of what you pay your grocer than the beef a farmer sells to the packing house, let alone the corn he bought to feed it......