Brings to mind Robert A. Heinlein's The Moon is a Harsh Mistress [1] --- the entire plot turned on the prospect of lunar "society" running out of water because

Brings to mind Robert A. Heinlein's The Moon is a Harsh Mistress [1] --- the entire plot turned on the prospect of lunar "society" running out of water because it used the water to grow grain and then exported the grain "downhill" to Earth. [1] http://en.wikipedia.org/wiki/The_Moon_Is_a_Harsh_Mistress http://en.wikipedia.org/wiki/The_Moon_Is_a_Harsh_Mistress