Matthew Johnson, University of Copenhagen (IMAGE) University of Copenhagen Caption Matthew Johnson, University of Copenhagen, is an associate professor at the Department of Chemistry where he studies chemical mechanisms in the atmosphere. Credit Credit: Mikal Schlosser Usage Restrictions Credit: Mikal Schlosser 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.