Meng Lu (IMAGE) Smithsonian Caption Ecologist Meng Lu measures green blades of sedge in the Global Change Research Wetland, at the Smithsonian Environmental Research Center in Maryland. Lu led a discovery that under higher carbon dioxide, sedges like these grow shorter and thinner stems. Credit Maria Sharova/Smithsonian Environmental Research Center Usage Restrictions This photo can be used for media reporting and other educational, non-commercial purposes, provided credit is given as provided in the photo, in accordance with the Smithsonian Terms of Use (https://www.si.edu/termsofuse). 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.