The global population is projected to hit eight billion people within 20 years. With a growing population, dramatically more food, water and energy is needed. Yet even today, food and water supplies are becoming increasingly stressed in the face of climate change, development and unsustainable natural resources consumption. Recent drought-caused food price hikes have provided a glimpse into what the resource-constrained future would look like without significant action.
The concept of the food-water-energy nexus refers to how each one of those things affects the other. Water is the most important part of this nexus, because it cannot be created or substituted. Water also directly affects both of the other items. For example, most forms of energy production require substantial amounts of water for cooling and mining. Agriculture accounts for more than 70 percent of global water withdrawals. By comparison, around 16 percent of global water withdrawals are for the industrial sector. More than three billion people will be living in water-stressed areas by 2020. Continue reading