Dr. Adrianos Retalis is Research Director at the Institute for Environmental Research and Sustainable Development, National Observatory of Athens, Greece. He holds PhD (University of Athens, Greece) and M.Sc. degree (University of Dundee, UK) in Remote Sensing and Degree in Geology (University of Athens, Greece). His scientific interests and accomplishments lie in the research areas of air pollution monitoring and assessment, land use/cover mapping, atmospheric correction algorithms, natural hazards, environmental management, and atmospheric electricity. He is a Member of the Editorial Boards for Land and Meteorology (MDPI), and a Guest Editor for Remote Sensing, Atmosphere and ISPRS International Journal of Geo-Information (MDPI).