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I don't think we'll be able to desalinate all that water, but figuring out an affordable pumping solution to combat sea level rise would be worthwhile, nonetheless. It's a "pipe dream" (sorry) at this point, but who knows what kind of energy technologies might make this doable someday. And if we have the affordable energy to achieve that, then I think we'll have a lot of options. Not buying Florida beach-front property any time soon though.