zero emissions vehicle
 

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LOL!

It seems a bicycle would be a lot more efficient!

What's with the Porsche at the end?

I saw this on Leno the other night. His joke: ".... finally, someone invented a way to jog outside...."

i'll bet it's a lot of fun going uphill.

It would make another nice place to hang my coat

That's not zero emissions, it would emit the greenhouse gas carbon dioxide. And, depending on the fuel used, perhaps methane.