What are the biggest challenges in tackling climate change that influence the way we live in cities? And how can science and diplomacy help bridge political divides and accelerate global transformations? John Schellnhuber, world-renowned climate scientist and pioneer of interdisciplinary research, will join us and offer some answers. As IIASA's new Director General, he will present his vision for a sustainable future which focuses on innovative solutions for addressing environmental challenges and transformative changes that will lead to a more just and sustainable society.