Wednesdays from 12 January to 9 February at 8pm at the Collège de Saussure, 9 Vieux-Chemin-d'Onex, 1213 Petit-Lancy. You will be able to attend free of charge 5 conferences organised in collaboration with the University of Geneva on subjects related to the consequences of global warming by 2050: the role of cities and urban policies, the threat of an increase in natural hazards, the fight to maintain biodiversity, computer models to promote renewable energies or the efforts to be made on economic, political and technical systems to fight against climate change while limiting inequalities between individuals.