How does a human population achieve zero population growth?
1 Answer
See explanation.
Explanation:
Positive population growth means that more people are being born than dying. Negative population growth means that more people are dying than being born.
Now, in order to have zero population growth, ZPG, the population in a certain region, like a country, for example, must neither grow nor decline.
Factors that contribute to a population's growth are
- births
- immigration
Factors that contribute to the population's decline are
- deaths
- emigration
This means that zero population growth is achieved when
#overbrace("births" + "immigrants")^(color(purple)("increase population")) = overbrace("deaths" + "emigrants")^(color(blue)("decrease population"))#
