The availability of food that is nourishing, diverse and balanced to sustain the food consumption of individuals is known as food security. It is concerned with the accessibility that individuals have to nutritious food to fulfil their dietary needs to lead a healthy and active lifestyle. The main components in this field are access, utilization, availability and stability. To measure these components, various scales such as Household Food Insecurity Access Scale, Household Hunger Scale and Coping Strategies Index have been developed. Some of the adverse effects of food shortage are famine, hunger, physical and psychological deficiencies. Factors such as global water crisis, climate change, food waste, politics, agricultural diseases and land degradation directly impact food security. Various approaches such as large-scale food stockpiling, agricultural insurances and use of genetically modified crops are aimed at achieving food security across the world. The book studies, analyses and upholds the pillars of food security and its utmost significance in modern times. It presents researches and studies performed by experts across the globe. Coherent flow of topics, student-friendly language and extensive use of examples make this book an invaluable source of knowledge.