David Grewell, Iowa State University (IMAGE) Iowa State University Caption David Grewell and a team of students have developed a virtual biorefinery control room that can help students and workers learn to operate ethanol and biodiesel plants. Credit Photo by Bob Elbert/Iowa State University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.