James Field, University of Arizona (IMAGE) University of Arizona Caption Professor Jim Field is chair of the UA chemical and environmental engineering department and co-director of the UA Dean Carter Binational Center for Environmental Health Sciences. Credit Pete Brown/UA College of Engineering Usage Restrictions This visual may only be used in conjunction with reporting/posting of this news release. Image/video credit must be included exactly as indicated. 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.