Floating cities are not unreasonable, there have been proposals to do so on Venus, due to its thick atmosphere and hostile conditions on the surface. A hollow structure filled with breathable air would float at about 50 kilometers, with enough buoyancy for extra components supporting a population
Gas, Gas Giants, and Gas Harvesting.
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Floating cities are not unreasonable, there have been proposals to do so on Venus, due to its thick atmosphere and hostile conditions on the surface. A hollow structure filled with breathable air would float at about 50 kilometers, with enough buoyancy for extra components supporting a population
https://en.wikipedia.org/wiki/Colonization_of_Venus