Jim Ehleringer, University of Utah (IMAGE) University of Utah Caption University of Utah biologist Jim Ehleringer and colleagues at Harvard developed a new method to estimate carbon dioxide emissions and thus verify compliance with a greenhouse gas treaty -- if the nations of the world ever agree to limit emissions of the climate-warming gas. Credit Lee J. Siegel, University of Utah 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.