Transcript for scene 43 of the video " Unlimited Fresh Water - part 1" by Rolf Witzsche - Ice Age Ahead not Global Warming  

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Deep-ocean desalination self-powering

The comparison of desalination with the river diversion project illustrates to some degree the scale of infrastructure that is required to make desalination a significant component of the freshwater supply of the world. 

Deep ocean reverse osmosis may require larger filter membranes to operate at lower pressures, the resulting scale of the required system wouldn't pose a problem. A deep-ocean desalination system with an output equal to the river diversion project, would have to be several thousand times larger than a modern large desalination plant. The building of such a large system wouldn't pose a problem. The size of a construction isn't a factor on the ocean floor. Also, with the deep-ocean desalination being self-powering, a large-scale system of this type would be far more economical to implement and to operate than the equivalent giant river diversion project.

 

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Published by Cygni Communications Ltd. North Vancouver, BC, Canada - (C) in public domain - producer Rolf A. F. Witzsche