As has been noted previously ,
http://lthforum.com/bb/viewtopic.php?t=12226&highlight=ethanol the increased use of ethanol derived from corn is having an impact on food prices.
Here's an article on an investment web site which discusses some of the impacts:
http://articles.moneycentral.msn.com/Investing/JubaksJournal/HowEthanolBitesYouInTheWallet.aspx
Production of corn in the United States is energy intensive and the net effect on energy consumption is debatable. However, as the government is subsidizing the price of ethanol-containing fuel at the pump, it is supporting demand for this product.
Production of ethanol will absorb 27% of U.S. corn production this year. The price of corn is substantially higher this year than last year. Products which use corn and corn products (such as corn syrup) are feeling cost pressure. Same for meat and dairy, as corn is an important feed for livestock.
Food prices are rising at the fastest rate in a quarter century. Increased corn production means we are importing more urea for use in production of nitrogen fertilizer from -- drum roll please -- Saudi Arabia and Quatar.
Not mentioned in the article is that the environmental benefits of ethanol are also hotly debated.
If cornstalks, switch grass, etc could be used in the production of ethanol it would strengthen the economic argument for its use as a fuel. Same for sugar cane, but the government charges hefty duties on imported sugar cane to protect the domestic sugar industry.
Where there’s smoke, there may be salmon.