[edited by] Jaco Appelman, Assistant Professor Systems Engineering, Delft University of Technology and Sustainability Innovator at FastFact.nl, Delft, The Netherlands, Anwar Osseyran, CEO SURFsara, the Dutch national HPC Center and Chairman of the Green IT Consortium, Amsterdam, The Netherlands, Martijn Warnier, Assistant Professor Systems Engineering, Delft University of Technology, Delft, The Netherlands