I am currently in Russia and there is hot water supply in every building. I can see the pipes which contain the hot water but what is the source ?
In: Engineering
In Iceland (where I live) we get all our hot water from the earth. It is pumped via insulated pipes and stored in insulted tanks near cities. We actually have a quite nice tanks like that here in Reykjavík. We built a restaurant and observation deck on it. Here is an image of it. Hot water for most of Reykjavík is stored in these tanks.
Image: [Perlan (the pearl)](https://imgur.com/krJxPLy)
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