Firstly in this film, we can find that the hoverboard are flying. Also we can see that they are using a different type of fuel and its a biofuel.

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In our society we don't have a flying skateboard in the market, but the true is that this type of skatebordings are in research phase. 

In addition in our time we have cars with fuel or hybrids, but not with biofuel.   ​