Dr Evangelos Gerasopoulos is an atmospheric physicist and research Director at the Institute for Environmental Research and Sustainable Development of the National Observatory of Athens. He specializes in the observation and simulation of atmospheric composition change and its impacts on the climate and health. He has worked as a researcher, among others, at the Max Planck Institute at the Biogeochemistry Department, in Germany. He is the Director of the Greek Group on Earth Observations (GEO) Office, member of the Programme Board of the Intergovernmental Group on Earth Observations (GEO/UN) and the newly established Special Scientific Committee on Climate Change. In the past he has served as member of the Sectorial Scientific Council for the Environment and Energy within the National Council for Research and Technology.