From the show:
None of these younger people would be here without the island's tiny, but unique power grid that runs almost entirely on renewable energy. A combination of wind, hydroelectric and solar, the first time it's ever been accomplished anywhere.
Maggie Fyffe: That is the biggest and most impressive project that we've done.
Steve Kroft: It's changed everything, right?
Maggie Fyffe: Oh, yeah. It's made life so much easier.
It was designed and funded with multiple grants mostly from the European Union and engineers from all over the world have come to study it. Like everything else on Eigg, it is run and maintained by revolving committees of islanders, the only visible sign of any sort of government.