Water scarcity is growing in urgency in many regions as population growth, climate change, pollution, lack of investment, and management failures restrict the amount of water available relative to demand. Signs of scarcity are plentiful. Several major rivers, including the Indus, Rio Grande, Colorado,Murray-Darling, and Yellow, no longer reach the sea year-round as a growing share of their waters
... [Show full abstract] is claimed for various uses. Water tables are falling as groundwater is overpumped in South Asia, northern China, the Middle East, North Africa, and the southwestern US, often propping up food production unsustainably. Climate change is expected to worsen water scarcity globally. The area subject to greater water stress due to climate change by the 2050s will be twice as large as the area undergoing decreased water stress. Policymakers look to a variety of solutions to address water scarcity.