Air Tracking of Fires in Asia and Africa (IMAGE) University of Maryland Caption This image shows modeled origin of air observed in the tropical Western Pacific during the CONTRAST and CAST campaigns. Air histories go back 10 days or until the air encountered precipitation and strong vertical winds. Polluted air (red paths) originates from regions with active fires (green) in Africa and Southeast Asia. Clean air (blue paths) originates from the Southern Hemisphere and over the Pacific Ocean. Credit Daniel Anderson 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.