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A comment on Why We Should Build Cloud Cities on Venus. Parent comment

Re:Why We Should Build Cloud Cities on Venus by maxerickson on Tuesday February 03, 2015 @08:29AM (#8990168)
Self contained is also different than self sufficient. With a lot of carbon dioxide in the atmosphere, all you need is a good energy supply, then oxygen is easy.

(A similar example, some submarines use electrolysis for oxygen)

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Re:Why We Should Build Cloud Cities on Venus by userulluipeste on Tuesday February 03, 2015 @09:54AM (#8990591)
As far as I knew, the submarine air "metabolism" was chemical in nature: http://en.wikipedia.org/wiki/Chemical_oxygen_generator#Uses
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Re:Why We Should Build Cloud Cities on Venus by maxerickson on Tuesday February 03, 2015 @10:03AM (#8990651)
(At least some) Nuclear subs use electrolysis:

http://www.defenseindustrydaily.com/treadwell-supplies-oxyge...

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