Population - Population is ultimately an issue of people...

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4/12/11
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4/12/11 Population is ultimately an issue of people and the availability of resources. Resources such as: Water Health care Education Fuel
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Population In 2008 6,697,254,041 – 2010 6,852,568,784 The Earth can hold a lot of people but how many can it support?
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4/12/11
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4/12/11
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4/12/11
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Top Ten China 1.3B India 1.1B US 310M Indonesia 242M Brazil 201M Pakistan 184M Bangladesh 156M (slightly smaller than Iowa) Nigeria 152M Russia 139M Japan 126M
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Ø Population Concentrations Ø Population Density Ø Arithmetic population/land area Ø 1000people/1000sq miles = 1 person/mile Ø 300M/9.6M kilometer = 31 or 80 persons/sq mile Ø Physiological population/arable land area Ø US : 445/sq mile, Egypt 6,682sq mile Ø Agricultural – farm population/arable land area Ø 10farmers/10 acres = 1 acre each Ø Egypt = 826 farmers per sq kilometer Population Distribution
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Arithmetic or Population Density EX: 20 people/5 miles = 4 people per square mile US 80/sq mile, Bangladesh 2700/sq mile
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Bangladesh: 2,700 persons per square mile
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Physiological US 445/sq mile Egypt 6682/sq mile Agricultural US 1/sq km Egypt 826/sq km
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Population Statistics Ø World Population mid-2009 – 6.8 billion – 2025 8.1 billion – 2050 – 9.4 billion Ø CBR 20/1000 CDR 8/1000 Ø Natural Increase Rate (NIR) 1.2% Ø CBR – CDR = NIR Ø Doubling Time if 1.2%: 72/1.2 = 60 years Ø 6.8B in 60yrs =13.6B in 60yrs = 27.2B in 60yrs = 54.4B….etc Ø IMR 46 – TFR 2.7 Ø (infant mortality rate, total fertility rate)
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Population Increase Ø Birth rates CBR # of births/total population per thousand Ø e.g. : 40,000/2,000,000 X 1000 = 20 or 20/1,000 Ø Niger 55/1000 Germany 8/1000 *areas of China and Japan are lower* Ø 20/1000 + High – Middle East; Africa; 12/1000 - Low - Europe; North America Ø Fertility Rates TFR # of children per woman - age 15-44 Ø 2.1 Replacement Rate - 2 = couple plus .1 for accidents Ø Zero growth Ø 2.6 World current TFR Ø 1.6 Developed Nations Ø 2.3 Less Developed Nations Ø 7.37 Niger Ø 1.2 multiple countries in Europe and Asia Ø Reading : Sections 2.3 & 2.4
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Mali Population 2007: 12M with TFR of 7.37, growth rate 2.7%, DT = 26 years … As of census 2009 14,517,176 people…2010 TFR 6.62.
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CBR TFR
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Population Decrease Ø Crude Death Rate CDR # of deaths/total population per thousand Ø e.g. : 20,000/2,000,000 = 10/1,000 Ø 1/1,000 UAE – 22/1,000 Afghanistan Ø 12/1,000 High 8/1,000 Low Sec 2.3 Ø Infant Mortality Rate IMR # of deaths of children under 1 year old / all live births per thousand Ø World 52/1,000 Ø 84/1,000 - Africa Ø Highest 166/1,000 Afghanistan Ø Lowest Singapore 2.1/1,0000 Ø US 6.7/1,000 44th Sec 2.4
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Population Growth Ø Natural Increase NI CBR-CDR/10 Ø e.g.: CBR = 22/1000 CDR = 10/1000 NI = 22-10 12/1000 or 1.2% Sec 2.3 Ø Doubling Times - The length of time it takes for population to double depends on rate of natural increase Ø 1% = 70 years 2% = 35 years 5% = 14 years Ø Fastest Niger - 3.4% NI DT 22 years Population 2005 14 million 2025 26 million 2050 53 million Ø Slowest Ukraine -0.8% Ø Dr. Barlett – population growth – youtube video
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NIR
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