With a drink and canapés, in the relaxed atmosphere of the Espace53 pod overlooking the vintage cars of the Autoworld Museum at Brussel's Cinquantenaire, we will stage a debate on climate change between Professor Jean-Pascal van Ypersele, Professor of Climatology and Environmental Sciences at the Université catholique de Louvain in Louvain-la-Neuve, Vice Chairman of the Intergovernmental Panel on Climate Change, and the still sceptical Professor Istvan Marko of the Chemistry Department of the same University.