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I don't get it, why don't poor communities build piping from their nearby water sources? People were able to do this 2000 years ago. Why do they need to invent a reverse-entropy machine?

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Ancient Roman Empire was politically stable. When this is not the case one really needs very local water sources.

Why isn't there an xprize for politically stabilizing these countries then? That would lead to vastly more efficient and convenient water sources.

Can't tell if you're joking

That means I'm probably on to something :)

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