[Utilising behavioural data to promote climate-healthy behaviour: methods, potential and future directions]

Climate-healthy behaviour plays a key role in designing sustainable strategies for health promotion. This article demonstrates how behavioural data can be leveraged to gain a clearer understanding of individual routines and structural conditions, and how evidence-based measures can be developed on that basis. Based on the interdisciplinary approach of behavioural and cultural insights (BCIs) and the COM‑B theoretical framework (Capability, Opportunity, Motivation-Behaviour), it explains how psychological, social and cultural factors influence human behaviour and the role of systematic behavioural data collection in promoting climate-healthy routines.On one hand, quantitative approaches such as online surveys, experience sampling (a real-time survey of experience and behaviour in everyday life) and (online) experiments allow for large-scale analysis and the identification of behavioural patterns. On the other hand, qualitative methods (e.g. interviews, focus groups, diary studies) provide in-depth insights into decision-making processes and social norms. Combined into so-called mixed-methods approaches, these procedures can uncover barriers-such as limited knowledge or insufficient infrastructure-and target them.Using the HEATCOM and PACE projects as examples, the article illustrates how heat protection and climate-healthy behaviour are examined within this integrative concept. Ethical considerations and data protection issues are also discussed, demonstrating how transparency and scientific evidence can dispel concerns of manipulation. Finally, the challenges of political implementation are explored, and recommendations for decision-makers are outlined on how to successfully integrate behavioural data into climate adaptation and health promotion measures.