I am from one where we still burn coal for heat (along with plastic bottles, tires, and rubber). You can imagine the impact of the electricity produced here. Yet there are IT jobs here and we're using many of the same products you do.
I've been using Drone and GitLab CI for years and likely won't be using anything like what you're describing because green energy is simply not available, and probably won't be for the next 50 years at the very least.
Hosting CI on the other side of the planet is a no-go for various reasons (we self-host everything since it makes a lot of sense for us).