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"The SF approach: an awareness that things could have been different, that this is one of many possible worlds, that if you came to this world from some other planet, this would be a science fiction world."
- Neal Stephenson

Air-Restorer Capsule  
  A device that re-oxygenates air in space suits.  

Then Nelsen took his turn, sitting as if within an inclosed vault, hearing the gurgle of bubbles passing through the green, almost living fluid of the air-restorer capsule. Chlorophane, like the chlorophyl of green plants, could break up exhaled carbon dioxide, freeing the oxygen for re-breathing. But it was synthetic, far more efficient, and it could use much stronger sunlight as an energy source. Like chlorophyl, too, it produced edible starches and sugars that could be imbibed, mixed with water, through a tube inside the Archer's helmet.
From The Planet Strappers, by Raymond Z. Gallun.
Published by Pyramid Books in 1961
Additional resources -

Compare to the air renewal method described in From the Earth to the Moon (1867), by Jules Verne.

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  More Ideas and Technology from The Planet Strappers
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