Dr. Ali Sayigh is Chairman and Founder of the World Renewable Energy Congress and Council; Director General of World Renewable Energy Network (WREN); Chairman and Founder of the Arab Solar Energy Society; and Past Chairman of the UK Solar Energy Society. Dr. Sayigh was recently elected to chair the Iraqi Energy Institute, and he actively consults on renewable and sustainable energy issues for a number of international organizations, including UNESCO, ISESCO, UNDP, ESCWA, & UNIDO. Dr. Sayigh was Director of Solar Seminars at ICTP Trieste, Italy from 1977-1995; Professor of Solar Energy at King Saud, Kuwait, and Reading Universities from 1969 to 1994, and Professor of Engineering at the University of Hertfordshire from 1994 to 2004. He was the founding expert in Renewable Energy at AOPEC. He is Fellow of the Institute of Energy; Fellow of the Institution of Electrical Engineers; and Chartered Engineer. He has published more than 400 papers and has contributed to and edited morethan 30 books. He has been Editor and Editor in Chief of several international journals including Renewable Energy and the International Journal of Environmental Sciences and Technology and Editor-in-Chief of the major reference work Comprehensive Renewable Energy. David Milborrow is an energy consultant with more than 40 years of experience in renewable energy. He has been an active member of the World Renewable Energy Network for the past 25 years. He carries out studies on the economics of renewable energy sources, and comparisons with those of the thermal sources of electricity generation, and is a specialist on integration issues. He is, or has been, an adviser to a number of bodies, including the European Commission, the UK Department of Trade and Industry, and the Engineering and Physical Sciences Research Council. He is technical adviser to the journal Wind Power Monthly and writes a monthly column on Wind Economics for them. He has published numerous articles on wind energy technical and economic issues and contributed to several books.  He has lectured at a number of universities. From 1984 until 1992 he was a principal engineer with Central Electricity Generating Board (UK). He obtained his BSc degree in mechanical engineering from London City University.