Sustainability refers to the use of goods and resources in such a way that meets the needs of the present generation without compromising the ability of the future generations to meet their needs. The ability of individuals within a geographical area to afford, access and source the required amount of food is known as food security. A sustainable food system refers to a type of food system that can fulfill the nutritional and food requirements of all people in a sustainable manner. Sustainability and food security are essential for reducing the effects of climate change while meeting the increasing demand for food in the world. The four pillars of food security are availability, access, usage and stability. Major issues affecting food security and sustainability include poverty, population, change in climatic conditions, inadequate distribution of food, and unmonitored nutrition programs. This book is a valuable compilation of topics, ranging from the basic to the most complex global issues and challenges related to food security and sustainability. It will help the readers in keeping pace with the rapid changes in this area of study.