Martin Kreeb has done his studies in Economics and Business Administration, esp. Environmental Economics and Environmental Management, at the Universities of Stuttgart/Hohenheim, St. Gallen and Witten/Herdecke. He has worked as Research Fellow at the German Competence Centre for Sustainability (DKNW), Witten/Herdecke University and at the University of Stuttgart/Hohenheim. Main interest: Environmental Performance Evaluation, Computer Supported Environmental Information Systems and Environmental Cost Management. In 1999 Martin Kreeb founded NWD Consulting in Berlin and Stuttgart, 2000 the German Competence Centre for Sustainable Management. From 2003-2010 he was Management Director of Consulting Projects for the German Ministry of Research in the topic of Sustainable Development.