GRES and Eco-Energy today announce a trading alliance focused on advanced biofuels.  A privately-held firm, Eco-Energy began in 1992 as an alternative fuel trader, providing full marketing and logistical support for ethanol manufacturers and has grown to be one of the premier ethanol marketing companies in the U.S.  GRES looks forward to a long and rewarding relationship with Eco-Energy in the ethanol segment and as they grow into the biodiesel market segment.