Since 2007, the effects and perceived threats of climate change has been the subject of controversial discussion in the United Nations Security Council (UNSC). Does climate change influence the perception, conception and practice of national and international security? Judith Nora Hardt and Alina Viehoff explore this question by examining 15 country case studies at the UNSC. These case studies have been conducted by international experts since december 2019. The research approach is based on a broad understanding of security policy and constructive approaches to security of Peace, Conflict and Security Studies. A special feature of the project, which is carried out in cooperation between the IFSH and the Climate Change and Security Research Group (CLISEC), is the inclusion of local expertise and a wide scientific network. The project is supported by the Federal Foreign Office of Germany.