There is a problem with hemispherical habitats that is often overlooked. There are two forces at play - air pressure acts up trying to lift the skin of the habi

There is a problem with hemispherical habitats that is often overlooked. There are two forces at play - air pressure acts up trying to lift the skin of the habitat of the ground. This must be opposed by anchoring the habitat to the ground, the force of which acts downward. The problem is that the first force scales with the surface area enclosed (or even volume - I'm not sure as I can't find the reference at the moment), while the second one scales with the circumference. So r^2 versus r. This gives a fundamental limit on how big hemispherical habitats can be.