Partially lying within the Corn Belt, South Dakota is a leading producer of ethanol fuel from corn.[1] As of December, 2011, South Dakota had 15 ethanol plants with a combined production capacity of over 1 billion U.S. gallons (3.8 million cubic meters) annually.[2] Sioux Falls is home to POET, one of the world's largest producers of ethanol.[3] Ethanol plants in South Dakota used 291 million U.S. bushels (10.3 million cubic meters) of corn in 2009.[4]