India is one of the most water-challenged countries in the world, from its deepest aquifers to its largest rivers. Groundwater levels are falling as farmers, new urban residents, and industries drain wells and aquifers. What water is available is often severely polluted, and the future may only be worse, with the national supply predicted to fall 50 percent below demand by 2030.

In 2009, the U.S. Congress passed a five-year, $7.5 billion aid package for a country it had all but abandoned just 10 years earlier. Indeed, if one word can summarize the U.S. relationship with Pakistan, “volatile” might be it. Since the September 11 attacks, the U.S. has appropriated nearly $61 billion in aid to Pakistan – more than twice what it received since independence in 1947.

Natural resource management is a trust issue. There’s no better illustration of this than a scenario exercise. A new CNA Corporation report, Bone Dry and Flooding, details a simulation they ran for transboundary water management in the Indian sub-continent. Players of the game – nationals of China, Pakistan, India, and Bangladesh who had all previously worked in politics, policy, or development – were given a hypothetical five-year time span to manage shared water resources.

Rice is a thirsty crop. Yet for the past three years, Alberto Mejia has been trying to reduce the amount of water he uses for irrigation on his 1,100-acre farm near Ibague in the tropical, central range of the Colombian Andes.

The damming of a river that feeds the world’s largest desert lake could lead not only to less drinking water for thousands of Kenyans, but international conflict between tribes for what little water remains.

BANGWEULU WETLANDS, Zambia – Out here on the endless swamps, a harsh truth has been passed down from generation to generation: There is no fear but the fear of hunger.