I've seen a lot of stuff lately about the upcoming water shortage and here is my solution. (it may be a little expensive to initialize, on the other hand it would produce fresh water for many years into the future) Reflective solar convex domes which concentrate sunlight into a point where electricity can be generated and then used to distill ocean water, the salt remaining could be purified and sold. The point is that this could potentially produce millions of gallons of water. Another solution would be to use solar panels to power large water distillers since solar panels get about 30% cheaper by the year to produce. My personal opinion is that coal power maybe coming to an end, especially in places like Southern California, Texas and Arizona where sunlight is plentiful year round. (there is a massive amount of untapped sunlight in these areas, likely enough to supply the entire nations electricity!) Thoughts?