Map (IMAGE) University of Wisconsin-Madison Caption The research covered 22 tropical countries, outlined in orange, across South America, Africa and Asia. Forest cover in 2010 is indicated in green. Credit Fanny Moffette / University of Wisconsin–Madison 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.