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Water supplies are coming under pressure in many parts of the world. Too much water is taken out of rivers or pumped from underground aquifers to be sustainable. While water has been used as a weapon of war for centuries, could its scarcity become a cause of future conflicts? With a finite supply of fresh water and increasing demands being placed on it, Owen Bennett Jones and his guests discuss the consequences on food production and social stability of an increasingly strained water supply for the planet's growing population.

(Photo: waterfall Credit: Getty Images)