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"If you don't care about science enough to be interested in it on its own, you shouldn't try to write hard science fiction."
- Frederik Pohl

Clearsac  
  A simple device that filters water perfectly for reuse.  

Americans in the Southwest have been emptying aquifers that took thousands of years to fill in mere decades. What will they do for water when the drought years come?

A guy off to the side of the parking lot was pissing into a Clearsac. He finished and held it up over his mouth, sucking as he squeezed; looking like the happiest man alive. People started out squeamish about Clearsacs, but eventually even the fussiest were grateful for them.
From The Water Knife, by Paolo Bacigalupi.
Published by Knopf in 2015
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  More Ideas and Technology from The Water Knife
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  - Nanotech Used To Create Custom Water Filters In Tanzania

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