Richard Gill, Bringham Young University (IMAGE) Brigham Young University Caption BYU soil scientist Richard Gill studies the effects rising levels of CO2 have on soils. Credit Jaren Wilkey/BYU Usage Restrictions This file may be used for working media. 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.