The International Energy Agency concluded that freshwater use is becoming an increasingly crucial issue for energy production around the world in its 2012 World Energy Outlook.

Between steam systems for coal plants, cooling for nuclear plants, fracking for natural gas wells, irrigation for biofuel crops, and myriad other uses, energy production consumed 66 billion cubic meters (BCM) of the world’s fresh water in 2010. That is water removed from its source and lost to evaporation, consumption, or transported out of the water basin — as opposed to water withdrawn, used, and then returned to its source for further availability, which is a far larger amount.

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