We have interpreted this charge to develop a document for national and international policymakers, the private sector and civil society that reports on the following: – The current and future challenges to food security from the physical effects of climate change – changes in temperature and precipitation means and variability – with focus on the most affected and vulnerable regions and populations (Chapters 1 and 2). – The state of knowledge on and need for agricultural adaptation to climate change, in the context of the already large challenges to food security from population and income growth in a world where many food-producing systems are already stressed and unsustainable (Chapter 3). – Agriculture’s current contributions to greenhouse gas emissions and the potential for agriculture in mitigation while meeting the growing demand for food (Chapter 4). – Coordinated and coherent national and international policy strategies and actions for dealing jointly with the food security and climate change challenges (Chapter 5). – Climate change impacts food security in many different ways. A short report cannot be fully exhaustive, either about the range of food security challenges or the threats from climate changeRather, the goal of this HLPE report is to synthesize existing research findings and highlight key issues to help national and international policy makers devise effective and equitable policies to combat the additional challenges to global food security from climate change.