Ecological Solutions (IMAGE) Virginia Tech Caption Zach Easton demonstrates a biodigester he developed to filter pollutants out of runoff water into the Chesapeake Bay. Credit Logan Wallace/Virginia Tech 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.