A Dutch company and an American ethanol producer hope to put a new kind of fuel in your gas tank — whether it makes economic sense or not. Thanks, Washington. Amid the cornfields of Emmetsburg, Iowa sits an ethanol plant that takes in 20 million bushels of corn and churns out about 55 million gallons of corn ethanol a year. Rising next to it is a revolutionary new facility. It will make ethanol as well, but instead of using juicy kernels of corn, its feedstock will be 285,000 tons a year of corncobs, leaves and husks. Although its 25 million...