It's really actually kind of fascinating when you think of how that energy source was made, with a mass die off of carbiniferous (I think) rootless trees, aka scale trees that all fell due to not being able to support their own weight probably because the incredible amount of oxygen in the atmosphere at the time, then the carbon from those trees got buried and pressed into "fuel diamonds", plentiful and packed with all the energy a type 0 civilization would ever need, but the very fact that using the results of that die off to power our species unabashedly, has doomed us, because we finally reached that ever important ceiling that ecologists/biologists are always talking about. We thought we outsmarted evolution and nature, but we are just as much a part of it as any other being or object.

It's kind of beautiful to me.