Christos Zerefos – Head, Research Center for Atmospheric Physics and Climatology, Academy of Athens. Professor of Atmospheric and Environmental Physics at the Universities of Athens, Thessaloniki, Visiting Professor, Universities of Minnesota and Boston, Samarbeidspartnere (Scientific Collaborator), University of Oslo. He has been known for his research in ozone, UV, ozone-climate interactions and climate extreme events. His research has been seriously taken into account to important international agreements such as the Montreal Protocol. Member, Academy of Athens, Academia Europaea, Norwegian Academy of Sciences and Letters, European Academy of Sciences, Russian Academy of Natural Sciences and other distinguished scientific societies. UNESCO Chair Holder on Natural Hazards; Recipient of the Global Ozone Award, 1997 and a number of distinctions, awards and medals from WMO/UNEP and several scientific societies (e.g. Blaise Pascal Medal, European Academy of Sciences; AGU Kaufman Award; European and Balkan Physics Societies Award; European Union Prize for Cultural Heritage-Europa Nostra Award and others). In the past 30 years he has served as Member of various Expert Committees in WMO, DG Environment and other international Organizations and has acted as author, contributor or reviewer in many WMO/UNEP Scientific Assessments of Ozone Depletion and reviewer in IPCC Aviation and extreme events reports (1998 and 2013). Award Certificate and Letter from UNEP and IPCC for substantial contribution to the reports of IPCC, which shared the 2007 Nobel Peace Prize with the former Vice President of USA, Al Gore (December 2007). His research work in peer reviewed scientific journals is acknowledged widely by the scientific community.