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Jul 16, 2014 at 22:03 comment added Móż @michelle that's not really relevant, and would be a better questions for geology.SE or geography.SE
Jul 16, 2014 at 17:12 comment added michelle Great answer. In the case of aquifers, can you explain why our waste water doesn't filter back into the aquifer and replenish the water we mined out?
Jul 15, 2014 at 11:02 history edited Móż CC BY-SA 3.0
emphasise energy cost per comment
Jul 15, 2014 at 9:07 comment added Flyto Just a suggestion to add to this - money is not the only limitation on desalinaton, but energy resources too. You've mentioned the energy required in terms of the cost of electricity, but for some nations (e.g. those who can't easily buy oil on the world market) such energy simply isn't available. Not to mention the worldwide implications from energy use if lots of people used desalination on a large scale. Energy and water tend to be quite closely linked (most methods of obtaining one require the other), and both are becoming increasingly scarce...
Jul 15, 2014 at 3:40 history answered Móż CC BY-SA 3.0