World’s pop growing increasingly rapidly, exponentially- most in quite recent.
Likely to peak at between 10~12bln in 2070.
CBR (Crude Birth Rate)- no. of births per 1000 ppl in pop
TFR (Total Fertility Rate)- av. No. of births per 1000 women of childbearing age
Why high birth rates: for labour, look after parents in old age, for continue family name, childrens are net
contributors to family income
Why birth rates come down: children are costly, government looks after ppl through pensions and health