You might enjoy Bucky Fuller's concept of what he called "Cloud Nine": > Fuller suggested that the mass of a mile-wide geodesic sphere would be negligible comp

You might enjoy Bucky Fuller's concept of what he called "Cloud Nine": > Fuller suggested that the mass of a mile-wide geodesic sphere would be negligible compared to the mass of the air trapped within it. He suggested that if the air inside such a sphere were heated even by one degree higher than the ambient temperature of its surroundings, the sphere could become airborne. https://en.wikipedia.org/wiki/Cloud_Nine_(tensegrity_sphere) https://en.wikipedia.org/wiki/Cloud_Nine_(tensegrity_sphere)