SMJJames:
"scarcity" is a property of a good. Even something as ubiquitous as air, or dirt, has a scarcity associated with it. There is only so much dirt. Most people dont consider dirt to be especially valuable, excepting as a place to put a house on, grow crops on, or transform into some product-- due to there being such abundance.
However, simply because something is in abundance now, does not mean it will be later. Take for instance, the passenger pigeons. Extinct now. Used to be so plentiful that they would black out the sky for hours when they migrated. Treating something with actual scarcity like it is endlessly elastic is exactly how and why they went extinct.
The only way to infinitely increase value, is to increase demand. The only sure-fire way to assure increases in demand, is to increase the human population. When you increase the human population sufficiently, it will cross the point where there really isnt enough food for the planet's population, even with a perfect distribution system.
Treating scarcity like it does not exist is not sane.
Reelya:
That really *IS* a zero-sum solution! That water is removed from the atmosphere, and having been removed, will not fall as rain elsewhere.