The Investigators (IMAGE) University of Gothenburg Caption Jenny Klingberg, Hans Linderholm, Håkan Pleijel and Maria Grundström have investigated the air quality. Credit University of Gothenburg 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.