Did you actually look at what you linked?

The main graph is only China and India and already shows a net inflection for China in the past few years. It will keep slowing. Read about population-lag effect.

The second graph nicely confirms that contrary to what you pretend population growth has started slowing globally.

There is no consensus about how much it will slow and when the peak will be reached. IPCCC had to adjust their hypotheses in the past because the lowest credible estimation where falling outside the lowest considered by the first climate model and some specialist argue we should look at even lower prediction. People in developing nations have stopped having large families faster than we thought.

> So it's not clear why you bring up population growth. It's not relevant.

If you don’t see how population size affects consumption, production and in fine pollution, I can’t do much for you.

> What is it and how is this impact measured in an undeniable way. It can't be temperatures because they don't track CO2 levels.

You are clearly arguing in bad faith or are clueless about the research surrounding climate change. In both case, I think it would be a waste of my time arguing further.