Gas delivery startups want to change the world – but will they blow it up first?

Whether or not the practices are safe, some wonder why companies are pouring resources into an area that so many are trying to innovate out of existence

It is hard to imagine a less hospitable niche for a startup to enter than gasoline - a combustible commodity that is (one hopes) being innovated into obsolescence.

And yet, over the past 18 months, at least six startups have launched some variation on the theme of "Uber for gas" - your car's tank gets refilled while it is parked somewhere.