Fastest way to oxygenate Venus
Scientists recently discovered a propellantless drive capable of completely negating gravity with low energy inputs! Huzzah! Sadly the Earth is going to be destroyed soon by a rogue handwave. Looking at their possible escape candidates the scientists settle on Venus. They build flying cities and sit them at 50km up.
They're having a great time but some of them want to open a window. What is the fastest way for them to alter the atmosphere to be breathable?
Edit: We can assume our scientists have access to the technology above our current level but within 50 years of advancement so nothing too amazing (think asteroid mining and relatively quick interplanetary travel) and the infrastructure to produce any raw materials or tools needed within a reasonable time frame.
This post was sourced from https://worldbuilding.stackexchange.com/q/134046. It is licensed under CC BY-SA 4.0.
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