Switch Grass (image) American Chemical Society Caption Switch grass swaying in the breeze could become a more economical source of ethanol to power cars down the highway thanks to discovery of a way to reduce the cost of making ethanol from non-food biomass. Credit US Dept. of Agriculture Usage Restrictions None 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.