 Construction of the first U.S. commercial plant producing cellulosic ethanol will commence in the State of Iowa in February 2007.The Voyager Ethanol plant in Emmetsburg, owned by POET, LLC, will be converted from a conventional corn dry mill facility into a commercial-scale biorefinery producing ethanol from not only corn but also the stalk, leaves, and cobs of the corn plant.Most ethanol plants rely on natural gas to power their processing equipment.