@FossThought @nickofnz the oil we're burning is actually older than that. Usually dating back to the Carboniferous Period about 300MYA. So many giant trees and such an oxygen rich atmosphere but without the microbes yet to decompose the dead trees, literal tons of organic matter piled up and eventually became buried and over millions of years and is now oil and coal. There will be more oil, it just takes a few million years for the processes that produce it to do their thing. Not super relevant to your post but just I find all of that so fascinating. We're literally burning dead bugs and trees from 300MYA to drive our kids to school and commute to our offices (all concepts *we invented*) and we can invent an even better more pleasant world that's cleaner and more sustainable for us to live in!