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Demographic Trends. Chapter 36. Demography. The study of human population statistics Affected by birth, death, immigration & emigration rates IR & ER often similar Population size depends on BR – DR + IR- ER A demographic transition model shows population growth with cultural development. - PowerPoint PPT Presentation
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Demographic TrendsChapter 36
The study of human population statistics
Affected by birth, death, immigration & emigration rates
IR & ER often similar Population size depends
on BR – DR + IR- ER A demographic
transition model shows population growth with cultural development
Demography
Represents population structure with respect to age and sex
Used for predicting future population structure
Also indicates future needs of the populace
Developing countries – lots of young dependants
Developed countries – more elderly dependants
Some gender imbalances can be seen
Population pyramids
Human population growing exponentially
Eventually global carrying capacity could be reached
Planet will be unable to support any further population increase
Limiting factors could regulate population
(increased death rate) Deer population used as
a model
Population Control
Birth control is most realistic option for population control
But differences in: - religious beliefs - medical care standards - economic situation - cultural/social backgrounds - education - status of women - morality of birth control
imposition all affect the effectiveness of
birth control Family planning needs social
& economic support Population control biggest
problem facing mankind
Birth Control / Morals