The calm before the storm an assessment of the 23rd Climate Change Conference COP23 in Bonn - Obergassel, Wolfgang; Arens, Christof; Hermwille, Lukas; Kreibich, Nico; Mersmann, Florian; Ott, Hermann E. 1961-; Wang-Helmreich, Hanna (Wuppertal Institut für Klima, Umwelt, Energie gGmbH, 2018)