Good-bye, Petrol!

ガソリンよさらば。
Attā, degviela.

http://jp.youtube.com/watch?v=uHffliC2whk

It works by the same principle as that for maglev trains. Amazingly, it does that only with permanent magnets!

I am not sure if this is a world-saving invention but looking at the wheel twirl is amazingly relaxing. :)