What is climate engineering? How and why are certain shifting geoengineering policies engendering conflict? How do we differentiate between and prioritise the multitude of governance factors? How does funding affect the outcome of policy implementation and how are traditional concepts still being utilised, in tandem with more modern ideas. In the fifth and final episode of this five-part mini-series on Climate Change and National Security focuses on these challenges. Dr Duraid Jalili from the King’s Environmental Security Research Group and Professor Matt McDonald from the University of Queensland, speak to Professor Olaf Corry, Professor of Global Security Challenges at the University of Leeds and expert in international politics and geoengineering, and Dr Naho Mirumachi, Reader in Environmental Politics and Convenor of the King’s Water Hub Research Group. They will discuss the challenges, risks and potential controversy facing proposed solution mitigation and adaptation of implementing large and small scale geoengineering policies.