Cloud Differences (IMAGE) University of Washington Caption The left shows cloud droplet concentrations from 2003 to 2015 averaged over the months of September, October and November, as observed by NASA satellites. The right side shows what the study calculated the concentration of cloud droplets would be without emissions along the shipping route (yellow line). The difference helps explain how much industrial pollution influences clouds. Credit Michael Diamond/University of Washington Usage Restrictions With credit 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.