Building and running a permanently manned lunar base alone will be incredibly expensive.
CNN: Mining the moon for a nuclear future
It is obvious why one of the biggest costs of a manned lunar base would be sending water to it from earth.
ECONOMIST: At least lunar gold-diggers will be able to take a shower
Eventually, ice deposits could provide water for a manned lunar base, which would otherwise have to bring its water expensively from earth.
ECONOMIST: Divining water
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