Vulcan Project emissions data (IMAGE) Northern Arizona University Caption Emissions map of entire U.S. landscape at high space- and time-resolution with details on economic sector, fuel and combustion process. Credit Courtesy Northern Arizona University 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.