This goes back to my theory that the people most freaked out about climate change are the ones with kids, who are mad that other less responsible people have more kids, while I'm just chilling here with no kids at all and clearly see that if all those assholes stopped having kids, climate change would be solved within 20 years.
Go Vegan! It’s easier than you think, especially since you live in a city. No judgements from me if you can’t/choose not to, it does take work. Just a bit of encouragement, and a thank you for making the compassionate and ecologically sound choice.
UN projections, which are on the "business as usual" side of things.
Plenty of events, like the pandemic, which put immense downward pressure on fertility.
Also, the African continent is a net food importer. This could be turned around - particularly by Nigeria, which has the natural resources to produce fertiliser, but so far the observed effect has been a surge (+65%) of imports.
With the situation in Ukraine being what it is, I don't think this is sustainable.
Niger is currently experiencing a population explosion, which will force it to implement the same policies as Kenya to prevent a Malthusian catastrophe.
I fear that a 'decent world war' nowadays may include nukes, so damage to the environment will be great.
As an example, the dam that was destroyed in Ukraine and flooded a 'small area' (considering the planet-scale)(https://www.cbc.ca/news/world/kakhova-dam-ukraine-russia-1.6...).
Which (your post and my thinking of a response) reminded me of the series: Aftermath - Population Zero (https://www.imdb.com/title/tt1264068/); I remember watching some series back in the day.. I think it's time to watch this again.
I'm slowly starting to realise that nukes are very unlikely to be involved simply because the selfish shits who start and run the wars know they personally won't survive if they start the nuke match.