We hit 8 billion in 2022 btw.

I think the problem is much worse than people imagine as well. Of those around 5.5 to 6 billion people live in "developed world" conditions (sanitation, water & electricity to the home). Over the next 20 years that's expected to grow to by another 1.5 billion (the previous 20 years was around the same). That alone is going to be a huge demand in energy, for construction and ongoing day to day energy usage.

On the other hand global energy demand has a very close correlation with the number of people living in developed world conditions - so after this point the growth in energy demand should start to level off.

Let's hope China continues to push renewables, and their investment in developing countries favours that instead of fossil fuels.

Yet Europeans will continue to hamstring their economic activity to lower their footprint which is really not doing anything in the grand scheme of things vs. China/India and what Africa will produce if/when they modernize.