Doubling the population will make things worse in 40 years. How is this hard? Double chickens? Double cows? Double coal plants? wtf? lol. You are the fool. Trying googling "when does population double".
Ooooff.
1. The population isn't projected to double even in the next century much less the next 40 years. In the next eighty years, the population is expected to increase by only 40%. If you took your own advice ("Google") then you'd know this: https://en.wikipedia.org/wiki/Projections_of_population_grow...
2. You're incorrectly assuming that the greenhouse gas emissions scales linearly with the population size *even as the emissions per MWh approaches zero. The demand for energy does indeed scale with population (probably sublinearly, but not going to pick that nit right now), but the goal is to drive down the emissions per unit energy to nearly zero much faster than population grows.
Better luck in the future.
https://theconversation.com/7-5-billion-and-counting-how-man...
"You're incorrectly assuming that the greenhouse gas emissions scales linearly with the population size *even as the emissions per MWh approaches zero."
No it will not be linear. If you have a population that is exponential.
> Nuclear fission once pulled off will make things much much worse.
What a foolish thing to say.