Thomas Dietz, Michigan State University (IMAGE) Michigan State University Caption This is Michigan State University sociology/environmental science and policy professor Thomas Dietz. Credit Kurt Stepnitz, Michigan State University Usage Restrictions Use only in association with this news release. 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.