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Too Many Humans? 7 Bil lio n and Gr ow ing ….
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10,700 babies/hour10,700 babies/hour
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Applied science dealing with population numbers 3 Categories: Developed Countries, Moderately Developed (Developing), Less Developed (Developing) Demographics of Countries http://www.census.gov/ipc/www/popclockworld. html
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Developed Countries Highly Industrialized Low birth rates Low Baby Mortality Longest Life Spans Highest avg. GNP’s US, Europe, Japan
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Moderately Developed Countries Medium-level of Industrialization Higher birth rates, Higher Infant Mortality Rates,Shorter Life Spans Lower avg GNP’s Mexico, Thailand, S. America
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Less Developed Country Agricultural - low industry Highest birth rates, Highest Infant Mortality, Shortest Life Spans Lowest average GNP/GDPs Ethiopia, Laos, Bangladesh
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GDP’s of the World Burundi = $125 per capita Kenya = $780 per capita Mexico = $9,000 per capita US = $45,000 per capita Luxembourg = $103,000 per capita
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Around the World… 1.China: 1.4 billion 2.India: 1.12 billion 3.US: 300 million http://www.census. gov/population/ww w/popclockus.html http://www.census. gov/population/ww w/popclockus.html 4.Indonesia: 218 mill. 5.Brazil: 190 million
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How Does Industrialization Affect Population Size? TheDemographicTransition **Seen during and after Industrial Revolution**
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STAGE 1 PRE-INDUSTRIAL High birth rate (high IMR) High death rate Low pop growth
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STAGE 2 TRANSITIONAL Industrialization >food availability >Health care Birth rate stays high Death rate begins to fall Pop grows quickly
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STAGE 3 INDUSTRIAL Birth rate falls to near death rate better jobs and education for women Decline in IMR Pop growth rate continues, but is low
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STAGE 4 POSTINDUSTRIAL Birth rate falls more Birth rate = death rate ZPG Then, birth rate declines more; less than death rate = neg. pop growth Unsustainability to sustainability Very few countries
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Infant Mortality Rate # of babies per 1000 that don’t make it to their 1st yr
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2006 Infant Mortality Rates
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Replacement Level Fertility # of kids that a couple should have to replace both parents = (2.1 - 2.5)
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Total Fertility Rate avg # of kids that a woman will have in her reproductive years (0 - 5+)
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Pakistan = 4.6 TFR
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United Kingdom = 1.6 TFR
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United States = 2.1 TFR
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Structure Predicting Population Changes using Age Structure
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Comparing Age Structure
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Pyramid Age Structure > people are at/near child-bearing, 15
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Rectangular Age Structure Zero Pop Growth (ZPG): B = D
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Inverted Pyramid Age Structure Not enough reproductive women to replace lost individuals; pop decreases.
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