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"In WWII, they had a saying that there are no atheists in foxholes. I think the modern equivalent of that is that there are no jaded, bored people in the high-tech industry, in the land of really good hardcore geeks."
- Neal Stephenson

Oxygen Freshener  
  A device that removed carbon dioxide from air and replaced it with fresh oxygen.  

"...Each of the suits has an oxygen freshener. Bring them here, Sven."

...Murkitt detached one of the fresheners from the inside of its overall. It was a brick-shaped piece of spongy chemical, processed to precipitate carbon from breathed air and released the freshened oxygen.

"This will break down our output of carbon dioxide for a time," announced Murkitt.

Technovelgy from Lost Rocket, by Manly Wade Wellman.
Published by Astounding Science-Fiction in 1941
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