Robert Walker, Michigan State University (IMAGE) Michigan State University Caption A study by Robert Walker, professor of geography at Michigan State University, contends that Brazil's policy of protecting the Amazon is working, contrary to common belief. Credit Michigan State University 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.