National Technical University of Athens (NTUA) - Energy Policy Unit, National Technical University of Athens (NTUA) - Energy Policy Unit, Bruegel, E3Modelling S.A., Imperial College London - Grantham Institute for Climate Change and Environment, Government of the United States of America - Joint Global Change Research Institute, Imperial College London - Department of Chemical Engineering, University of Geneva, Polytechnic of Milan, National Technical University of Athens (NTUA) - Energy Policy Unit, Imperial College London - Grantham Institute for Climate Change and Environment, E3Modelling S.A., Polytechnic of Milan, National Technical University of Athens (NTUA) - Energy Policy Unit, Polytechnic of Milan, University of Geneva, HOLISTIC P.C., Bruegel, E3Modelling S.A., Polytechnic University of Milan, Imperial College London, Government of the United States of America - Pacific Northwest National Laboratory, Government of the United States of America - Pacific Northwest National Laboratory, Government of the United States of America - Pacific Northwest National Laboratory, Basque Centre for Climate Change (BC3) and Independent