Power Oats (IMAGE) University of Iowa Caption A University of Iowa study finds that mixing oat hulls with coal reduces carbon emissions and the release of particulate matter. Credit Tim Schoon, University of Iowa 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.