Duckweed (IMAGE) North Carolina State University Caption The tiny duckweed plant not only cleans up waste from industrial farms, but produces five to six times more starch per acre than corn. Starch is what is used to produce ethanol. Credit Mike Yablonski Usage Restrictions Photo credit must be given. 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.