Most countries in West and East Asia are under 2.1% of birth rate which is under replacement rate. [[Elon Musk]] did warned about Demography crisis for declining of birth rate.<ref>[https://www.ncbi.nlm.nih.gov/search/research-news/17030/ Elon Musk thinks the population will collapse. Demographers say it's not happening | CNN]</ref> | Most countries in West and East Asia are under 2.1% of birth rate which is under replacement rate. [[Elon Musk]] did warned about Demography crisis for declining of birth rate.<ref>[https://www.ncbi.nlm.nih.gov/search/research-news/17030/ Elon Musk thinks the population will collapse. Demographers say it's not happening | CNN]</ref> |