Major European cities including Tirana (Albania); Ghent, Leuven and Mechelen (Belgium); Prague (Czechia); Copenhagen, Høje-Taastrup and Roskilde (Denmark); Helsinki, Lappeenranta, Oulu, Tampere and Turku (Finland); Grenoble (France); Freiburg im Breisgau (Germany); Budapest (Hungary); Fl...