SDU Climate Cluster

Welcome by Sebastian Mernild, Head of SDU Climate Cluster, DIAS Chair of Science, Co-chairperson for the LIFE ACT project.Climate Change and Dilemmas by Henrik Seiding, Chairperson for the LIFE ACT project.Climate change is no longer a distant challenge – it is reshaping the very way we plan, design, and live in our cities. Urban development is at the frontline, facing a series of complex dilemmas: How do we balance densification with the need for green, climate-adaptive spaces? How can cities move fast enough to address urgent risks while still ensuring democratic legitimacy and citizen engagement? And how do we reconcile ambitions for economic growth with the necessity of building long-term resilience?Henrik explores these tensions, drawing on examples from Aarhus and abroad, where technical solutions, nature-based strategies, and questions of climate justice collide. Cities like Aarhus, Copenhagen and Rotterdam illustrate both the possibilities and the trade-offs in climate-conscious urban planning.The key message: there are no simple answers. Navigating these dilemmas requires political courage, cross-disciplinary collaboration, and a willingness to rethink how we define livability in a climate-challenged future. Henrik Seiding is Executive Director of the Department of Technical Services and Environment in Aarhus MunicipalityClimate Transformation and Dilemmas by Jens Hesselbjerg Christensen, Professor at the Niels Bohr Institute, the University of Copenhagen.Over the past 35 years, climate science has advanced from a specialized research field to a central topic in public and political discourse. This lecture addresses not only the state of climate change but also the persistent challenges in communicating its science to society. While climate science is grounded in empirical evidence and reproducible results, public discussions often frame it as a matter of opinion, creating a tension between fact-based knowledge and perception.Drawing on my experience engaging with the media and broader audiences since the early 1990s, I will explore how careful, informed listeners differ from instances where communication is complicated by preconceptions, journalistic dogmas, or ideological framing—exemplified by controversies surrounding figures such as Bjørn Lomborg.The lecture will highlight key dilemmas: balancing accuracy with accessibility, countering misinformation without alienating audiences, and navigating the expectation of debate when scientific consensus is clear. I will also reflect on the role of scientists as public informers, the ethical responsibilities in presenting complex uncertainties, and the societal demand for immediate solutions in contrast to the slow, evolving nature of climate science. Through examples from my career, the talk will offer insights into how climate scientists can engage effectively with the public while maintaining integrity, emphasizing that communicating climate change is not about persuading with opinion but translating evidence into understanding and action.