As physicist, Dr. Harry Lehmann has been General Director I “Environmental Planning and Sustainability Strategies” of the German Federal Environment Agency since 2004. He was an early member, and is now the President, of the Factor 10 Club for resource productivity and sustainable use of natural resources. He is one of the founders of Eurosolar. In 2011 he became Executive Chairman of the World Renewable Energy Council. He has published several books. Since 1985, Harry Lehmann has lectured at various universities, most recently at the University of Luneburg.