“I don’t know”. First almost honest answer I’ve heard from a climate scientist. He just won’t say the truth.
The real answer is, if India and China don’t also wipe out their energy systems, which they are not going to do, the total world cooling would be less than zero. Of course even if the whole world wipes out their energy systems the earth won’t cool since CO2 is not the cause of the minor increase in temperatures. It is really really hard for the increase in CO2, a lagging indicator, to be the cause of anything.🤷‍♂️🙄