Dammed thirsty: the cross-border fight for water
With half the world experiencing water scarcity for at least part of the year, the huge dams being built by some countries to boost their power supplies while their neighbours go parched are a growing source of potential conflict.. One of the two hydroelectricity plants that produce the most power in the world, alongside China's Three Gorges, had its energy shared out under a 1973 treaty.