Simple, solar-powered water desalination
I guess this an awesome tech for places where there is no clean water, as long as those places are close enough to the shore.<p>But again, I doubt that any investor will be interested, as they will probably not get good enough ROE with this.<p>This would probably get the attention of government of some poor countries, or maybe some humanitarian organizations, or even the military.<p>I would probably be confident that a small portable kit could be marketed to survivalists and it would sell extremely well.