The IPCC report published in August 2021 entitled The Physical Science Basis again demonstrates two issues: the urgency of the climate issue, on the one hand, and the indispensable role of science in establishing and weighing the facts and searching for possible solutions, on the other. The Academy feels a joint responsibility for and urgency about this matter and wishes to contribute in different ways and on different levels: as a learned society and guardian and interpreter of science, as an institute organisation and in its own day-to-day management.