Dr Ezra Clark is the Chief of Section for Science Technology and Innovation Policy (STIP) and currently Director of the Division of Science Policy and Basic Science (PBS), in the Natural Sciences Sector of the United Nations Educational, Scientific and Cultural Organization (UNESCO). Prior to this Ezra worked for the United Nations Environment Programme (UNEP) in the field of ozone and climate under the Montreal Protocol. Ezra holds a PhD in Freshwater Ecology and Hydrology from Exeter University, United Kingdom.