Sven E. Harnung is a Senior Lecturer in the Department of Chemistry at the University of Copenhagen and was Head of Department for 12 years. He teaches courses on environmental, inorganic, physical and analytical chemistry, including pharmaceutical applications. His current research concentrates on magnetic studies of single molecule magnets. He is the author of three chemistry textbooks in Danish. Dr Harnung has organized several congresses, including an International Union of Pure and Applied Chemistry (IUPAC) General Assembly. He has been a member of the Danish National Committee for Chemistry for more than 30 years and he is a Fellow of IUPAC. He has served as a board member of the journals Acta Chemica Scandinavica and Physical Chemistry Chemical Physics. Matthew S. Johnson is a Senior Lecturer at the Department of Chemistry in the University of Copenhagen. He teaches courses on environmental chemistry, physical and quantum chemistry and scientific writing. His main research interest is atmospheric chemistry, including kinetics, spectroscopy and stable isotopes in atmospheric trace gases. He is a co-author of more than 65 articles in peer-reviewed journals. He has invented and patented a method for efficient emissions control and improving building energy efficiency. He was awarded a Fulbright Fellowship to study stratospheric chemistry at the Max-lab electron storage ring in Lund, Sweden. He has worked as a researcher for Honeywell and Medtronic and has research collaborations with many groups around the world, including Ford Motor Company and the Tokyo Institute of Technology.