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 neighbors go parched are a growing source of potential conflict.

Scientists: Largest US reservoirs moving in right direction

Parts of California are under water, the Rocky Mountains are bracing for more snow, flood warnings are in place in Nevada, and water is being released from some Arizona reservoirs to make room for an expected bountiful spring ...

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