Didier Hauglustaine is a physicist and Director of Research at the Centre National de la Recherche Scientifique (CNRS). He currently works at the Laboratoire des sciences du climat et de l'environnement (LSCE) at the Université Paris-Saclay. He specializes in atmospheric chemistry and the role of atmospheric chemistry in climate change. He has co-authored three IPCC reports on climate change and other international and European Commission reports on the role of ozone in climate change and the impact of pollutant emissions on atmospheric composition and climate. He has written several books for the general public on climate change and ozone, and is the author of 150 scientific publications.