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"Water, water, every where, And all the boards did shrink ; Water, water, every where, Nor any drop to drink." - Rime of the Ancient Mariner, Samuel Taylor Coleridge
The world is experiencing shortages of some of its most plentiful (water and trash) and rarest items (helium and isotopes). Some places are even short on women. Are we condemned to a future of permanent shortages? Or is the glass just half full at the moment?
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