One of the most threatening issues facing the world today is 'food scarcity', keeping a little less than one-fourth (2015) of the global population hungry and malnourished, ostensibly shameful for the affluent world. The book looks at the reasons for this blaring disparity between the two sections of the global population, along with growing demand for animal-protein-rich food by the affluent world causing it to be afflicted with grave health problems. This study delves into causes involved in creating this disparate as well as contrasting situation and looks for preventive and restorative measures to strengthen 'food security' for entire mankind, assuring not only availability of adequate food 'at all times and at all places', but also indicating how to make it healthy for the affluent class to evade a catastrophic future. At the same time, climate change resulting from mindless wrong-doings of man over time, with debilitating effects on the food production system, impacting heavily on food supply, combined with environmental degradation and ever-shrinking biodiversity posing as the greatest challenge to human survival, demands greater emphasis on mitigating measures to halt the process culminating as never before in making both food and water scarce commodities, imperilling human existence by the end of this century.