Vindskip

Lade A S, a Norwegian ship design firm, has come up with a refinement on the sailing ship concept. Like the tall ships the plied the seas before the 20th century, vindskip is propelled primarily by the wind, using a hull design that works like a rigid sail. 

Lade A S Vindskip

Using this design, a vindskip can achieve a 60% reduction in fuel consumption and an 80% reduction in exhaust pollution.  That sounds pretty compelling to me.

Here is a link to a promotional video on the vindskip design...  http://www.youtube.com/watch?v=cZo33MQeFN4