The speed and scale of climate change presents unique and potentially monumental security implications for individuals, future generations, international institutions and states. Long-dominant security paradigms and policies may no longer be appropriate for dealing with these new security risks of the Anthropocene. In response to this phenomenon, this book investigates how states have reacted to these new challenges and how their different understandings of the climate-security nexus might shape global actions on climate change. It focuses on the perceptions, framings, and policies of climate security by members of the United Nations Security Council (UNSC), the world's highest ranking multilateral security forum. Empirically, the book presents detailed, bottom-up case studies from local authors of every UNSC member state in 2020. It combines this with an innovative theoretical approach spanning national, human and ecological security that helps to capture the complex dynamics of state-led approaches to dealing with security in the Anthropocene. This book therefore offers readers a compelling picture of climate-security politics in the UNSC, beyond Council debates and resolutions. By comparing and contrasting how different framings of climate security impact various policy sectors of members states, the authors are able to assess the barriers and opportunities for addressing climate security locally and globally."This timely contribution to the literature on climate security examines the under-analysed relationship between the policy approaches of key countries at the national, and at the international level. Policy alignment at multiple levels of governance will be critical if we are to respond adequately to the ubiquitous challenges posed by climate change and variability." Shirley Scott, Head of School and Professor, School of Humanities and Social Sciences, UNSW Canberra at the Australian Defence Force Academy (Australia).