Lecture 23-Human Problems

Lecture 23-Human Problems - BarriertoMigration

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Barrier to Migration http://www.birdmonitors.net/intro.html 1
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Oil Spill in San Francisco, CA November 9, 2007 2
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Oil Spill off the Black Sea (Russia) 3
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Oil Spill off the Black Sea (Russia) 11/12/07 4
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Paul Combs Tribune Media Services (November 14, 2007) 8
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Human population growth is directly related to environmental problems! 9
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Human population growth is directly related to environmental problems More people use more resources More people want a better way of life = more resources Greater resource use = more pressure on the environment 10
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Human population growth is directly related to environmental problems Land use: competition between agriculture and natural areas Water diversion Pollution Resource use: plant and animal products/trade 11
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Three Gorges Dam in China 12
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Three Gorges Dam in China http://landsat.usgs.gov/gallery/images/Landsat_Gallery_466_1_full.jpg 13
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Three Gorges Dam in China http://dsc.discovery.com/news/2007/06/22/gallery/dam3_zoom.jpg 14
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Exponential and Logistic Growth 15
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Factors Affecting Human Population Size Population change = (Births + Immigration) – (Deaths + Emigration) 16
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Natural Rate of Increase <1% 1-1.9% 2-2.9% 3+% Data not available Annual world population growth 17
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Births per woman < 2 2-2.9 3-3.9 4-4.9 5+ No Data Global Fertility Rates 18
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Factors Affecting Birth Rates and Fertility Rates Cost of children Child labor (value) Urbanization Demographic transition Depression End of World War II Baby boom Baby bust Echo baby boom 19
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Factors Affecting Birth Rates and Fertility Rates Opportunities for women Old age care Infant mortality rate Age of marriage Availability of contraception/family planning/ abortion Religious beliefs and cultural norms 20
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Ages 0-14 Ages 15-44 Ages 45-85+ Rapid Growth Guatemala Nigeria Saudi Arabia Slow Growth United States Australia Canada Male Female Zero Growth Spain Austria Greece Negative Growth Germany Bulgaria Sweden Population Age Structure 21
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Factors Affecting Death Rate Infant mortality rates Life expectancy Disease 22
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Infant deaths per 1,000 live births <10 <10-35 <36-70 <71-100 <100+ Data not available Infant Mortality Can Affect Overall Death Rate 23
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Migration Environmental refugees Reducing births
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Lecture 23-Human Problems - BarriertoMigration

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