Optimum sustainable population dependent on cultural carrying capacity
Level at which most people could live comfortable and with freedom without impairing the ability of the planet to sustain future generations
Population change
Subtract the number of people leaving a population (through death and emigration) from the number entering it (through birth and immigration) during a special period of time (usually one year)
(Crude) Birth rate
The number of live births per 1,000 people in a population in a given year
(Crude) death rate
The number of deathers per 1,000 people in a population in a given year
Fertility
The number of children born to a woman during her lifetime
Replacement-level fertility
The number of children a couple must bear to replace themselves
Total fertility rate (TRF)
The average number of children a woman typically has during her reproductive years
Baby-boom period
The period of high birth rates between 1946 and 1964
Life expectancy
The average number of years a newborn infant can expect to live
Infant mortality rate
The number of babies out of every 1000 born who die before their first birthday
Migration
Movement of people into (immigration) and out of (emigration) aspecific geographic area
Environmental refugees
Illegal immigrants
Age structure
The distribution of males and femailes in each age group in the world's population
Prereproductive
Reproductive
Postreproductive
0-14
15-44
45 and up
Baby bust (birth death)
Rapid population decline
Demographic transition
As countries become industrialized, first their death rates and then their birth rates decline
Preindustrial stage
There is little population growth due to harsh living conditions leading to high birth and death rates
Transitional stage
Death rates drop and birth rates remain high
Industrial stage
Birth rate drops and eventually approaches the death rate
Post industrial stage
Birth rate declines further, equaling the death rate and reaching zero population growth
Family planning
Provides educational and clinical services that help couples choose how many children to have and when to have them