Your title says it all: isn't that just a sail? And haven't we had partially motor-powered sailboats for a while now?
Wow, scientists have invented a sailboat! What will they think of next!
Next thing you know they'll suggest we use high-speed passenger and freight trains that travel at 200-300 mph and use 1/8th the energy and release 1/6th the global warming emissions instead of jet planes ...
Nah. The oil lobby will kill that.
Hmmmm, traveling from Germany (ex-Nazis) to Venezuela (Godless Communists)
That pretty much says all you need to know about this so-called technology.
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