US-HRN-2019 (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption AmeriFlux monitoring towers such as this one in a field in Arkansas will collect data on carbon dioxide, nitrous oxide, and methane emissions. Credit Beatriz Moreno García 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.