Salvia, F. Pietrapertosa, M. Olazabal, S. G. Simoes, P. A. Fokaides, B. I. Ioannou, D. Geneletti, M. Matosović, M. V. Balzan, S. De Gregorio Hurtado, N.-A. Spyridaki, A. Flamos, V. Viguié, L. Tardieu, K. Rižnar, N. Belšak Šel, E. Feliu, O. Heidrich, D. Reckien. Invited presentation Climate ambition and carbon neutrality in 327 European cities in the Panel “Climate Neutrality in Cities” (Moderator: Prof. Ingo Stadler). 15th Conference on Sustainable Development of Energy, Water and Environment Systems (SDEWES). 1-5 September 2020, Cologne, Germany.