WAEC - Economics (2014 - No. 11)
A declining population is one in which the population is
experiencing a high rate of emigration
made up of large number of old people
not producing enough goods
not contributing enough to the national income
説明
Emigration; is the act of leaving one's own country to settle permanently in another; moving abroad.
A population decline (or depopulation) in humans is a reduction in a human population caused by events such as long-term demographic trends, as in sub-replacement fertility, urban decay, white flight, or rural flight, or due to violence, disease, or other catastrophes.