Radon gas leeches into homes with and without basements. Radon is heavy, so you can easily evac the gases with a proper air filtration and circulation system.

Radon gas leeches into homes with and without basements. Radon is heavy, so you can easily evac the gases with a proper air filtration and circulation system. Managing heat in underground homes is a known and solved problem. Managing heat and cold above ground is the real problem, that people have accepted as normal.