When asked whether he is optimistic or pessimistic about the future of our planet’s climate, Georg Kaser answers simply and clearly that it is no longer a question of asking this question, but only of doing something. And he is doing something now. Georg Kaser is Professor of Climate and Cryosphere Research and currently Dean of the Faculty of Geo- and Atmospheric Sciences at the University of Innsbruck. He contributed to the 4th and 5th Assessment Reports of the Intergovernmental Panel on Climate Change (IPCC) and is now also active in the current 6th reporting cycle. The professor is considered one of the most influential climate researchers worldwide. He thinks the “Fridays for Future” movement is great, both as a scientist and as an individual. He will talk about what needs to be done. What each one of us can do to get this under control.