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No cities on the Moon: a billion tons of water is not enough for sustainability
(www.frontiersin.org)
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A century. How about we start small and see where it goes before we make plans for the centennial celebration? There's water asteroids, potentially more water on the moon to be found ...
I find it weird to dismiss the idea just because in a century the water may run out, assuming a population of 1 million (!!)
For sure, there could be lots of solutions here, and we really don't know much about what's under the surface either. I just thought it was interesting how much water you need for a million people to live.