Greek island bets on green future

A ferry departs from Livadia port on the Aegean Sea island of Tilos, south-eastern Greece (Thanassis Stavrakis/AP)

When deciding where to test green technology, Greek policymakers picked the most remote point on the map: tiny Tilos.

Providing electricity and basic services, and even access by ferry, are all a challenge for the island of just 500 year-round inhabitants.