Professor Paul J. Crutzen died on 28 January, 2021, at the age of 87 years. The Dutchman was Director of the Atmospheric Chemistry Department at the Max Planck Institute for Chemistry in Mainz, Germany, from 1980 to 2000. Together with Mario J. Molina and F. Sherwood Rowland he received the 1995 Nobel Prize for ChemistryContinue reading “RIP Paul Crutzen”