It should be apparent that predicting the future without looking very closely at the present will likely yield flawed outcomes.
I am currently living through a drought. There are at least six threatened or endangered species that
I share space with here in the floodplain. The farmers don't hesitate to plant crops and run their pumps , some pumps almost 24/7. The river is drying up and the endangered Steelhead in the shrinking ponds left will never make the ocean. Now the farmer feeds the world and progress is progress but to the fish going extinct well civilization didn't work out so well. The pumps and tractors and round-up and fertilizers are all produced with fossil fuel and nobody has a clue how to re-engineer all that. But we are feeding the world that way and most of us rationalize it as progress but those blinders are laying waste in the river today, and there ain't a tear shed over it.
I am also an acidification doomer. There are shellfish ( pteropods + oysters ) that are already suffering and once the oceans sop up the Co2 we have already committed it to well there will be bigger hits, more species ,in more places dying, and even if we hit those 40% emission targets time and the remaining 60% we do emit will continue to kill more and more as the pH continues to drop.oh well , progress. And you can rationalize it like we all do and rationalize it as it transpires, and the coral reefs fail, we will continue to farm with fossil fuels . You would find many of those farmers in complete denial and righteous about feeding the world . There is really no other way to feed them all and so we continue on.
So I would like to make the point one more time that we need to accept a little more failure maybe, a lot more inconvenience, and maybe something like the pain we so cavalierly dispense . Maybe little pockets of regional extinction... to even things out a bit. There just isn't anyway to sugar coat it, getting Co2 emissions down to near zero by 2100 will require enormous pain and some sort of dieback. Somehow, somewhere there will be a balance between the pain we inflict and the pain we receive .