Stephen Decina, Boston University (IMAGE) Boston University Caption Stephen Decina, Boston University PhD student, measures carbon dioxide being released from the soil using an automated soil carbon dioxide efflux system. The equipment, which is controlled with a smartphone, passes air through an infrared gas analyzer and measures the concentration of carbon dioxide accumulation over time. Credit Stephen Decina 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.