An increase in the number of people that are from country, state, or city.
China is the most populous country in the world
So the Chinese government start a one-child policy
to reduce the population
Japan has a problem with people that are too
aging
The government should encourage the Japanese
woman to have chridren
India population are too yuong
So there' are not enough adults to take care of
the chridren
Population pyramid
A graph that can let you understand the percentage form
a country, state, region, or city by using different
using different numbers of age and seperated into male and female.