Between 1980 and 2001 Paul J. Crutzen was Director of the Atmospheric Chemistry Department, Max-Planck-Institute for Chemistry. As a trained meteorologist (University of Stockholm, Sweden) P.J. Crutzen held research and director positions in various institutes, among other at the National Center for Atmospheric Research (NCAR) Boulder, Colorado, USA. Since 1980 he is Director of the Atmospheric Chemistry Department. His main scientific interest is in the role of atmospheric chemistry in climate and biogeochemical cycles. He served as Vice-Chairman of the International Steering Committee of the IGAC (International Global Atmospheric Chemistry) Core Project of IGBP (1990-1996) and Chairman of the European IGAC Project Office (1992-1996). Currently he is Vice-Chairman of the Scientific Committee for the International Geosphere-Biosphere Project (SC-IGBP). Among several awards he received the Nobel Prize in Chemistry 1995 (with Dr. M. Molina and Dr. F.S. Rowland, U.S.A.). P.J. Crutzen´s Department has participated in a series of fire research campaigns.