Barcelona is stuck in its worst drought in decades. To quench the parched city, Spain is looking into buying boatloads (literally) of water from France. New Scientist asks if this is beginning of the "water wars": the impending global clashes over the increasingly precious liquid.
We're not sure if countries will come to blows solely over access to water anytime soon, but it does seem clear that water is going to change from a refreshing drink into an increasingly potent-and desirable-instrument of power.
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