Prof. Dr. Guido Sonnemann received a Ph.D. in chemical engineering from the University of Rovira and Virgili, Spain, after training in environmental chemistry and engineering in France and Germany. He worked for 10 years, from 2002 to 2012, on various aspects of life cycle and integrated resource management in the United Nations Environment Programme in Paris, at the end as a scientific focal point for the Resource Efficiency sub-programme. Now he is a teacher and researcher in the field of life-cycle approaches for sustainable chemistry and materials development in the context of a circular economy at the University of Bordeaux, France, where he heads the Life-Cycle Group CyVi at the Institute of Molecular Sciences. He has published more than one hundred journal papers, book chapters, and professional reports. He is a co-editor of recent books on Integrated Life-Cycle and Risk Assessment, Life-Cycle Management, and Life-Cycle Approaches to Sustainable Regional Development. His research topics include Life-Cycle Assessment, Sustainable Chemistry, Sustainable Materials, and Industrial Ecology.