We are talking about trace quantities of salts though. You could get around any ...

lotsofmangos on April 13, 2014 | parent | context | favorite | on: This Tower Pulls Drinking Water Out of Thin Air

We are talking about trace quantities of salts though. You could get around any measurable problem by passing the water through a large box full of pebbles. Also, water is for agriculture as well as drinking, so this should increase the stability of food supply anyway.