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1004.Chap12 - Chapter 12 Population and Environment Basic...

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Chapter 12, Population and Environment
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Basic population statistics World Population: 6.9 Billion Pop. Growth Rate: 1.3% per yr. Doubling Time Rule of 70 Doubling Time (yrs.) = 70/Growth Rate(%) EG 70 = 54 years 1.3 70 = 35 years 2.0%
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Population Growth Rate Crude Rate of Natural Increase = CBR - CDR CBR = [N(Births)/Population Size] * 1000 CDR = [N(Deaths)/Population Size] *1000
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The Population Growth Rate (CRNI) Varies MDC 0.1 LDC 1.6 Africa 2.4 So. Amer. 1.5 China 0.7 Asia 1.6 except China U.S. 0.6 Europe -0.1 E. Europe -0.5
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Quick history of population growth Population of World Year Years to add one Billion 1 Billion 1800 ---- 2 Billion 1925 125 3 Billion 1960 35 4 Billion 1975 15 5 Billion 1987 12 6 Billion 1999 12
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TFR: Total Fertility Rate The number of children the average woman can be expected to have in her lifetime, given the fertility rate at a given time in a given place. (e.g. country).
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TFR LDC (except China) 3.5 Africa 5.2 Niger 8.0 Asia (except China) 3.1 China 1.7 Latin America 2.7 Oceania 2.4 U.S. 2.0 Europe 1.4
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Is rapid population growth a problem? Food supply
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Thomas Malthus Size Or Amount Food Population Time
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Thomas Malthus Positive checks War, famine, epidemic disease Preventive checks Defer marriage Opposed to contraception & abortion
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Is Rapid Population Growth a Problem?
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