Energy | Third World Generation Solution?

People are always looking for ways to do things like purify water or generate electricity in a smarter, more efficient way. One advantage to this quest is that new technologies can be used in impoverished areas of the world to help raise the standard of living in those places. Well, I Stumbled this little video from Popular Mechanics and was impressed with the ingenuity. I would like to see some more discussion revolving around scalability. That being said this is fun, you could probably build one yourself!