Going hybrid: Planes, trains…cruise ships?

Hurtigruten MS Roald Amundsen plug-in hybrid cruise shipThe Roald Amundsen, an expedition cruise ship that can carry 500 passengers and is designed for rough waters, set out last Monday on its maiden voyage silently, on electric power. It can plug in to charge its batteries when it's in port, but with a schedule reaching to the far poles of the world, the ship cruises mainly like a conventional hybrid...