Prof. Dr.-Ing. Hermann-Josef Wagner is Professor for Energy Systems and Energy Economics at the Ruhr-University of Bochum, Germany. He worked as a scientist for the Research Centre Juelich, for the German Parliament and for different universities. His relevant experiences are on the fields on energy systems analysis, renewable energies like wind energy and life cycle analysis. He is engaged as chairman of Energy and Environment in German Association of Engineers. He was also admitted as member by the German Academy of Science Leopoldina. The German President decorated him for his engagement with the Order of Merit of the Federal Republic of Germany. Contact: email: lee@lee.ruhr-uni-bochum.de Dr.-Ing. Jyotirmay Mathur is a mechanical engineer postgraduate in energy studies from Indian Institute of Technology, Delhi, India; and doctorate from University of Essen, Germany. He specializes in the areas of renewable energy systems, energy policy modelling and energy efficiency. Working as Associate Professor in the Malaviya National Institute of Technology in Jaipur, and Head of the Centre for Energy and Environment. Dr. Mathur has been founder coordinator of the postgraduate program in energy engineering and another program in renewable energy at his institute. He is involved with several committees of national importance in India. Contact: email: jyotirmay.mathur@gmail.com and  jyotirmay@mnit.ac.in