Paludan has taken this strategy and given it a new twist with his proposed Green Power Island. His design makes use of seawater pumped into a lagoon-like reservoir built into an artificial island. When demand is low, pumps driven by wind turbines empty the reservoir. At peak periods, water is allowed to flow back into the reservoir, through turbines generating electricity to meet the rising demand. By positioning the reservoir within an existing body of water, the system removes the necessity of having to create two reservoirs at different heights.

works well for all the cities that are near a coast, and iirc, 70% of humanity is living within a 100 miles of the coast, so this is actually something that might actually work.

via DVICE.

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