(IMAGE) Higher Education Press Caption None Credit Peter M. VITOUSEK, Xinping CHEN, Zhenling CUI, Xuejun LIU, Pamela A. MATSON, Ivan ORTIZ-MONASTERIO, G. Philip ROBERTSON, Fusuo ZHANG Usage Restrictions Credit must be given to the creator. License CC BY 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.