Food security can be understood as a measure to make food available and accessible to human beings. It involves physical, social, and economic access to sufficient, safe, and healthy food to all the people while meeting their food preferences and nutritional needs for an active and healthy life, at all times. This should be irrespective of their class, gender, or region. Food and energy security is measured in terms of calories to digest out to intake per person per day available on a household budget. It addresses the concepts of availability, accessibility, utilization, stability, climate change and food sovereignty. The book presents researches and studies performed by experts across the globe. Also included herein is a detailed explanation of the various concepts and applications of food and energy security. Scientists and students actively engaged in this field will find this book full of crucial and unexplored concepts.