To answer just a small part of your post ( us ancient people need to preserve our energy, don't you know ), in the real world the great forests and jungles of the world are being destroyed as fast as humans are able to light fires in them. That's so they can raise cattle for hamburgers and plant palm oil trees to make soap and such like. Why do they need to do that, you ask. Because the human population keeps growing and needs more hamburgers and soap, and that makes the 1% very very rich. After all, doesn't every peasant dream of being rich and living in a mansion with a tv in every room, a huge yacht, a private jet and a car for every day of the week?
Your lot can blather away about sequestering carbon and such like as much as you like, but while the world's population is on a vertical graph line increase, it's a lost cause.
IMO humans are the author of their own demise because they just keep making too many of us. That's never going to stop till Gaia removes us, so why worry, be happy ( till you can't ).