Well, some of these messages are for our poor Earth-bound cousins, who have to put up with global warming and such.
We are nuclear powered, and global warming is a goal for us. A four-year orbit means we only get one fourth the sunlight that we were used to. We compensate for that by making our solar mirror a concentrating one. And we use artificial lights in Habitats A and B for the growing plants and other food culture.
We don't need trains here in the belt, but these "arseteroids" are rather dumb, and sometimes we need to push their little butts around. We use nuclear energy for that too, with nuclear powered photon thrusters.
I’m up for anything that pushes dumb butts around, little or not...