LEAP s.c.a.r.l., Laboratory of Energy and Environment Piacenza - LEAP s.c.a r.l., Laboratory of Energy and Environment Piacenza - LEAP s.c.a r.l., Laboratory of Energy and Environment Piacenza - LEAP s.c.a r.l., Polytechnic University of Milan, Polytechnic University of Milan - Department of Energy, Eucore, Eucore, Investor Relations - Buzzi SpA, Buzzi Unicem, Spanish Council for Scientific Research (CSIC), Spanish Council for Scientific Research (CSIC), Energean Oil & Gas S.A., Energean Oil & Gas S.A., TITAN Cement Company S.A., TITAN Cement Company S.A., Air Liquide Italia S.p.A., Air Liquide Italia S.p.A., Fraunhofer-Institut für System- und Innovationsforschung, Fraunhofer-Institut für System- und Innovationsforschung, The Boston Consulting Group, The Boston Consulting Group, Celitement GmbH&Co.KG, Celitement GmbH&Co.KG, Utrecht University - Copernicus Institute of Sustainable Development, Independent, Wietersdorfer Alpacem Gmbh, Wietersdorfer Alpacem Gmbh, Independent, Independent, Tallinn University of Technology, Department of Geology (TalTech DG), Tallinn University of Technology, Department of Geology, LUT University, LUT University, TPI - Tecno Project Industriale S.r.l., TPI - Tecno Project Industriale S.r.l., Clust-ER Greentech Energia e Sviluppo Sostenibile, Clust-ER Greentech Energia e Sviluppo Sostenibile, Centre for Renewable Energy Sources and Saving (CRES), Centre for Renewable Energy Sources and Saving (CRES), A2A S.p.A., A2A S.p.A., Eni S.p.A., Eni S.p.A. and Polytechnic University of Milan - Department of Energy

Laboratory of Energy and Environment Piacenza - LEAP s.c.a r.l., Laboratory of Energy and Environment Piacenza - LEAP s.c.a r.l., Laboratory of Energy and Environment Piacenza - LEAP s.c.a r.l., Polytechnic University of Milan - Department of Energy, Polytechnic University of Milan, Polytechnic University of Milan - Department of Energy, A2A S.p.A., Società Italiana Acetilene e Derivati SIAD SpA, TITAN Cement Company S.A., TITAN Cement Company S.A., Lappeenranta-Lahti University of Technology (LUT), Lappeenranta-Lahti University of Technology (LUT), LUT University, LUT University, IKNGmbH and LEAP s.c.a.r.l.

affiliation not provided to SSRN, Polytechnic University of Milan, Politecnico di Milano - Dipartimento CMIC "Giulio Natta", affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN and A2A S.p.A.