Grassini-01 (IMAGE) University of Nebraska-Lincoln Caption This aerial photo shows where environmentally fragile savannah has been converted to farm land in the Cerrado region of Brazil. Credit Alencar Zanon/University Federal of Santa Maria Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. License CC BY-NC 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.