Birth rates are already below replacement levels worldwide, and well below it in all but Africa. "Peak baby" worldwide was in 2013. Japan's population peaked in 2017. Outside of Osaka and Tokyo, the country is emptying out. Look to Japan first to see how this plays out.
China's population is peaking now. So is the US native-born population.[1]
Almost all the population growth worldwide is in sub-Saharan Africa. That region may not survive global warming.
China's population is peaking now. So is the US native-born population.[1]
Almost all the population growth worldwide is in sub-Saharan Africa. That region may not survive global warming.
[1] https://fred.stlouisfed.org/series/LNU00073413