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What are some of the characteristics of pre-modern world population growth?
- -Pre-modern (~1750) population growth was so slow.
- -There was no census data before the mid-18th century, so population was estimated based on church, community data and ecological condition(environmental condition + socioeconomic condition and technology available to people)
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What are some of the characteristics of modern world population growth?
- -In modern world, there is a dramatic increase in world population.
- -After industrial revolution, population growth accelerated.
- -Now population growth is mostly in less developed countries in global South.
- -Even though natural increase rate is relatively low compared to the 1960s, population numbers added remain high because of population momentum.
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Why was pre-modern world population growth so slow and what are the major factors and conditions that precipitated the change in population growth rates?
- -Life expectancy was low, and (children) death rate was very high.
- -High fertility rate, but also high death rate resulted in slow population growth.
- -Cultural practices and the fact that nutrition condition was not good affected the population growth in pre-modern world.
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When did the world population growth rate peak and what is the current world population growth rate? (for current world pop growth rate see also World Population Data Sheet)
- -Annual rates of natural increase in world population peaked in 1960s around 2.0%, and since 1971 it has been below 2.0%.
- -current population growth rate is 1.2%.
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What are the world population projections for the mid of the 21st century? What are the different scenarios?
- -8.1 billion people (from world population data sheet)
- -From 2010 Revision of population projection to 2100, different scenarios are follows:
- -High fertility(2.5): 10.7 billion people,
- -medium fertility(2.0): 8.9 billion people,
- -low fertility(1.6) 7.3 billion people.
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Why do population projections differ?
- -Because it is based on human activities that are unpredictable.
- -Variance of mortality and fertility level make difference in projection scenarios.
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