The ESAB Working Group Sustainable Chemistry thanks very much Prof. Dr. Susana Nieto Cerón, Prof. Dr. Moira Leanne Bode, Prof. Dr. Daniela Ubiali, and Prof. Dr. Chao-Jun Li, for their excellent and inspiring lectures and discussion, and the audience for the active participation. We have dedicated today's Webinar Sustainable Chemistry to the Memory of Distinguished Professor Dr. Roger Sheldon, Member of the ESAB Scientific Commitee and the ESAB Working Group Sustainable Chemistry, and we are very thankful for this precious time of exchanging and keeping memories of our common past with Prof. Dr. Roger Sheldon.