 From 2008 to 2011, he was the chair of the scientific committee of the world's largest exhibition (SOS-Planet) on climate change in the Liège-Guillemins railway station.In 2011, he co-organised the First Stephen Schneider Symposium (Boulder, Colorado, US).In 2013, he co-chaired the First interdisciplinary Symposium on Sustainable Development in Namur (Belgium), and co-chaired its second edition in 2015 in Louvain-la-Neuve (Belgium).