Map of Global PM2.5 in 2016 (image) University of Exeter Share Print E-Mail Caption Figure 1: (a) Map of global PM2.5 in 2016; (b) Changes in concentrations between 2010 and 2016. Units for both are μg/m3. Credit Professor Gavin Shaddick/University of Exeter Usage Restrictions Credit: Professor Gavin Shaddick/University of Exeter Share Print E-Mail 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.