Guy P. Brasseur is a Senior Scientist and former Director at the Max Planck Institute for Meteorology, Hamburg, and a Distinguished Scholar at the National Center for Atmospheric Research in Boulder, Colorado. He received his doctor's degree at the University of Brussels and has conducted research in Belgium, the USA, and Germany. He was Professor at the University of Brussels and the University of Hamburg. His scientific interests include questions related to atmospheric chemistry and air pollution, biogeochemical cycles, climate change and upper atmosphere chemistry and dynamics. He has chaired several international research programmes, and is associated with national Academies in Hamburg, Brussels, and Oslo.