Low Tech, Simple, Clean Energy, Salt Water to Fresh Water

I went to a lecture the other night about the island of Kaho’olawe which the US military used as a bombing range and destroyed the fresh water table of (Hey, here’s a large island in Hawaii…what should we do with it? I know, let’s bomb the hell out of it!– do you think the Japanese would have come to the same conclusion? I doubt it…
Anyway…part of the problem they have is getting fresh water…I recommended a solar still..which essentially is just like this…awesome right?