How does water scarcity affect our food security?

Water scarcity already affects every continent and more than 40 percent of the people on our planet. By 2025, 1.8 billion people will be living in countries or regions with absolute water scarcity, and two-thirds of the world’s population could be living under water stressed conditions. The lack of water limits farmers’ ability to produce enough food to eat or earn a living. South Asia, East Asia and the Middle East for example are already close to their resources limits, and their population is still growing.