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GRIMES, IA - AUGUST 07: Grimes Sweetcorn worker Paulette Vandyke helps a customer purchase fresh corn at a Kum N' Go gas station on August 7, 2012 in Grimes, Iowa. An exceptionally hot summer and the worst drought in more than a half century has caused cut prospects for the U.S. corn crop to a five-year low and has sent prices up to over $8.00 a bushel in late July trading. The price surge and limited supply has also prompted ethanol plants to voluntarily slow production by 20 percent, a two year low. (Photo by Justin Sullivan/Getty Images)
