Much of the need for water does not necessarily have to do with it being used to satisfy obvious needs like drinking, but rather its necessity to grow food or to help keep a sanitary environment. As the world’s population continues to grow exponentially, the need to feed everyone grows exponentially as well at alarming rates. The amount of water it takes to produce certain kinds of food can be quite staggering at times. Beef, for example, can cost up to three thousand gallons to grow only one kilogram (1). Clearly there is a link between water availability and famine when rains don’t come or rivers dry up, but water scarcity it can also lead to problems of environmental decline and social unrest. One of the primary factors to water scarcity has to do with the impact of population growth. The UN estimates that people need about fifty liters of water for their basic needs throughout a day, but this estimate omits the water needed for industrial purposes, growing food,
Bibliography: 1. Chartres, Colin John., and Samyuktha Varma. Out of Water: From Abundance to Scarcity and How to Solve the World 's Water Problems. Upper Saddle River, NJ: Financial Times/Prentice Hall, 2010. Print.