Figure 2 (IMAGE) University of Washington Caption The upper panels show the average nitrogen dioxide detected over China in February 2020 versus what authors calculate would have been expected without the pandemic. Center panels show the total amount of particles in the air during the same time period, with no significant difference. Bottom panels show the average size of cloud droplets in February 2020, also with no significant difference. Credit Diamond et al./GRL 2020 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.