what would cause births to go down when deaths go up?
There is no relationship.
Deaths go up because births went up. Period. That's all.
Births go down because of social/economic situation. Look at japan, korea, Taiwan They're full. Population levelled off. It'll go up slightly, down slightly but barring any war or disaster will probably stay the same.
People are not stopping having babies. But instead of everyone having 3+ kids on average, it'll be 2.1 kids average. Cities are full. Worlds full. Yes, there is a lot of wilderness still, but it's needed to conserve natural wildlife and capture carbon.
No it's just death-rate catching up to birth-rate: https://ourworldindata.org/grapher/births-and-deaths-projected-to-2100?country=~OWID_WRL
People are living longer now than ever before.
This chart is even more alarming! Why predict births going down and deaths going up? What would cause such a phenomenon ?
Deaths go up because births went up. Births go down because they think the population will level off at ~10.9B https://ourworldindata.org/uploads/2019/06/2019-Revision-%E2%80%93-World-Population-Growth-1700-2100-772x550.png
Again, what would cause births to go down when deaths go up? Why would people stop having babies??? What do they think is going to happen?
Think for a second.
There is no relationship.
Deaths go up because births went up. Period. That's all.
Births go down because of social/economic situation. Look at japan, korea, Taiwan They're full. Population levelled off. It'll go up slightly, down slightly but barring any war or disaster will probably stay the same.
People are not stopping having babies. But instead of everyone having 3+ kids on average, it'll be 2.1 kids average. Cities are full. Worlds full. Yes, there is a lot of wilderness still, but it's needed to conserve natural wildlife and capture carbon.