[bambax]

> a 2m^3 tank at home

Err, what? I'm in Paris, I can't drill that kind of hole anywhere near my home. The article is about the EU; but I doubt most people can do that even in the US, except when you have a house in the middle of nowhere with lots of land around it.

[JulianMorrison]

Not to mention: huge underground tanks of gasoline are a fire and explosion hazard. They are an environmental hazard if they leak or spill. They require building to safety codes. They require trained and skilled operation. They need to be to insured.