Monty, you're not getting it.
Where is over-population the worst?
It's not Africa - it's Europe and Asia. In the UK we are at about four times what might be considered a "healthy" population for the land to actually support. We are roughly thirty times what a pre-industrial economy can support (Something like 2-3 million).
The populations of Europe and Asia also drive consumption - especially of things like read meat and electronics. In Africa there is over-population but this is in large part being driven by the needs of advanced economies, strip-mining resources, over-production of cash crops...
In the event of the collapse of the global economy who starves? Europe or Africa.
If you want to get serious about "saving the planet" you need to recognise the real problem is over-population leading to over-consumption. Everything else, including climate change, comes from that. If you don't address the population issue you are just kicking the can down the road. All the modelling that has been done assumes that once a certain income-threshold is reached and a certain level of infant mortality is achieved then people will stop having so many children and the population will stabilise.
This is rather like the fallacy ten years ago that Islam "just needed a reformation" and Muslims would stop being so zealous as they mellowed out.
European scientists with a Euro-centric worldview will be the literal death of us.
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