graphic (IMAGE) Stanford University Caption Unused methane emissions in the U.S. from landfills, wastewater treatment plants and oil and gas facilities. Credit Adapted from El Abbadi, et al. / Nature Sustainability Usage Restrictions No restrictions. License CC0 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.