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So you've never seen a puddle evaporate after a rain shower? Or seen the rain evaporate off your car? At any temperature there are molecules of water that move fast enough to enter the gaseous state. Even ice sublimates. It's just a matter of statistics.

In many places of the world, the issue is not availability of water, but the fact that it is briny or polluted. Evaporation would work just as well here.