I'd love to be optimistic and positive just don't see where it would come from, not today at least. In this country we had a tiny 20 million population with the resources of the half of the world, abundant everything. If sustainable, prosperous humanity is ever possible, where else it could be tried, to show an example?
Nope. Cut, cut, cut, fish, fish, fish, drain, drain, drain, kill, kill, kill as fast as possible, markets won't wait! Will there ever be enough? Keep dreaming.
Suppose ten years from now a miracle happens and we unlimited source of energy, a sun here on Earth. Will it solve all problems? Cut, cut, cut, sell, sell, sell ever accelerating tempo, 10x, 100x energy consumption all going somewhere, where? The problem is not carbon, it's the insatiable expansion: first drain, cut and sell, then think and regret. I don't think there's been one sustainable human civilization over millennia of history, recorded and unrecorded, unless the environment held the population at bare survival level, over population in limited resources means war. If you know how to be optimistic, short of total ignorance, please show the way.