Simple and straight to the point:
A series of connected balloons, a treadmill, filled with light gas. The ones on earth level warm and expand and float up, expand more, meet cooler atmospheric layers, cool, shrink, descend, warm up by friction and warmer layers, expand, reverse inertia, and all the while oh so many ways to extract energy from it, for human use.
I have no intention of pursuing this. This is either keep, discard, or release. Public domain. But the #FractalUniverseRevolution is very dear to me, and if I can hook this idea to ways to progress in the exploration of the mathematical universe, like 'Building A Universe Competition' #BAUniC, I will do it.
If you donate to this post, I will boost it, or in a remind, praising or omitting you, but you can remind and boost it yourself, and may we ride the front of the revolution together.
More details and drawings if this gains traction, again, because I intend to hook up my own obsession to it, which you can skip over if you like, or tell a friend, better.
For example: Balloons of various types (foam, matrix), and alternate start or end options, platforms, underground, and gaining energy more efficiently through increasingly complex structures, unlike the treadmill that any Kim Jon Un can practice and become surplus.
Like, remind, put a good word in, subscribe.