Foggy and Polluted Inversion (IMAGE) University of Utah Caption Polluted air in Utah's Salt Lake Valley often is capped by fog, as is the case in this image of a temperature inversion holding cold, smoggy air close to the ground, just below the level of the Mormon church temple in Draper, Utah. University of Utah meteorologists are wrapping up two months of field measurements as part of a three-year, National Science Foundation-funded study of inversions and the weather conditions that promote them. Credit John Horel, University of Utah 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.