Team that led the study (IMAGE) Penn State Caption Nathanial Warner, on left, professor of civil and environmental engineering, and Katharina Pankratz, a doctoral candidate in civil and environmental engineering, led the study, which was published in Science of the Total Environment. Credit Poornima Tomy/Penn State Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND 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.