Energy Recovery Rides Clean Water Wave

The reason why is a classic supply-demand quandary: The amount of fresh water remains constant at 3% of all water on Earth. But according to the United Nations Population Fund, global consumption will double every two decades. So in 13 years, the International Water Management Institute estimates, one-third of the world’s population will face a severe water shortage.

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Source: http://www.thestreet.com/s/energy-recovery-rides-c