Increasing population will be a contributor in the future if we do not change our technology, but that does not matter because even if everyone but the west (who has a stable population level) stopped emitting carbon we'd still be screwed
Focusing on reducing population is literally preemptive optimization on something that may or may not be a problem depending on the trajectory of energy/production over the next 10 years. It is also just a polite way of saying eugenics
It is already a massive problem and it will only get worse.
Again, emissions are only a small part of the pressure we put on the environment.
Deforestation, loss of natural habitat, dwindling fish stocks, pollution at large, and indeed emissions: These are all caused by ever more people needing ever more resources.
This has nothing to do with eugenics, which has a completely different meaning.
Focusing on reducing population is literally preemptive optimization on something that may or may not be a problem depending on the trajectory of energy/production over the next 10 years. It is also just a polite way of saying eugenics