As the world has grown more “crowded” and developed, climate change has proved to be (relatively) less and less of a problem (per capita). That boogy-man doesn’t roar. Furthermore, as I have pointed out to you on your home turf, the best UN prediction tools (though not the ones it cites) say that population will peak and recede within slightly more than one generation, and is already beginning to plateau.
Your assumptions and analyses are dysfunctional and contrafactual from the get-go. Neither hyping nor tweaking will improve, resuscitate, or rehabilitate them.