POPULATION GROWTH AND CHANGE• Key Terms:• Population growth• Basic Demographic Equation• Rate of Natural Increase•...
World Population Growth ThroughBillions History 12 11 ...
Annual Increase in World PopulationMillions100 90 80 70 60 50 40 30 20 10 0 1951 1956 1961 1966 1971 1976 1981 1986 19...
Growth in More, Less DevelopedBillions Countries10 9 8 7 6 5 4 Less ...
Trends in Population GrowthPopulation Increase and Growth Rate, Five-Year Periods Worldwide ...
Notes on Trends in Population Growth Worldwide• This figure illustrates the lag between changes in the rate ofgrowth and t...
World Population Clock2005 Less ...
Birth and Death Rates, WorldwideRates of birth, death, and natural increase per 1,000 population4035302520 ...
Notes on Birth and Death Rates, Worldwide• Birth rates and death rates are decliningaround the world. Overall economicdeve...
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Pop dynamics

Published on: Mar 4, 2016
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Transcripts - Pop dynamics

  • 1. POPULATION GROWTH AND CHANGE• Key Terms:• Population growth• Basic Demographic Equation• Rate of Natural Increase• Doubling time• Carrying Capacity• Population Projection• Mathematical methods• Component methods• Baby boom
  • 2. World Population Growth ThroughBillions History 12 11 2100 10 9 Modern Old Age 8 Iron Middle Stone Bronze New Stone Age Age Age Ages 7 Age 6 2000 Future 5 4 1975 3 1950 2 1900 1 Black Death — The Plague 1800 1+ million 7000 6000 5000 4000 3000 2000 1000 A.D. A.D. A.D. A.D. A.D. A.D. years B.C. B.C. B.C. B.C. B.C. B.C. B.C. 1 1000 2000 3000 4000 5000Source: Population Reference Bureau; and United Nations, World Population Projections to 2100 (1998).
  • 3. Annual Increase in World PopulationMillions100 90 80 70 60 50 40 30 20 10 0 1951 1956 1961 1966 1971 1976 1981 1986 1991 1996 2001 2005Source: United Nations, World Population Prospects: The 2004 Revision, 2005.
  • 4. Growth in More, Less DevelopedBillions Countries10 9 8 7 6 5 4 Less Developed Regions 3 2 1 More Developed Regions 0 1950 1970 1990 2010 2030 2050Source: United Nations, World Population Prospects: The 2004 Revision (medium scenario), 2005.
  • 5. Trends in Population GrowthPopulation Increase and Growth Rate, Five-Year Periods Worldwide 87 90 2 83 80 79 80 76 76 75 1.8 72 70 1.6 Percent increase per year 1.4 60 1.2 50 1Millions 40 0.8 30 0.6 20 0.4 10 0.2 0 0 1980- 1985- 1990- 1995- 2000- 2005- 2010- 2015- 1985 1990 1995 2000 2005 2010 2015 2020 Net population added per year Annual population growth rateSource: United Nations, World Population Prospects: The 2004 Revision (medium scenario), 2005.
  • 6. Notes on Trends in Population Growth Worldwide• This figure illustrates the lag between changes in the rate ofgrowth and the net increase in population per year.• Over the period 1985-1995, the population growth ratedeclined (a reflection of declining fertility), yet millions ofpeople were added to the world’s population (which peakedaround 1985, when 87 million people were added eachyear).• From 2000 on, the growth rate will continue to decline.Between 2015 and 2020, we will still be adding 72 millionpeople each year. Why? Because the generation of womennow having their children is very large as the result of highfertility in their mothers’ and grandmothers’ generations.
  • 7. World Population Clock2005 Less More Less Developed Natural Developed Developed Countries Increase per World Countries Countries (less China) Year 80,794,218 1,234,907 79,559,311 71,906,587 Day 221,354 3,383 217,971 197,004 Minute 154 2 151 137Source: Population Reference Bureau, 2005 World Population Data Sheet.
  • 8. Birth and Death Rates, WorldwideRates of birth, death, and natural increase per 1,000 population4035302520 Natural Increase1510 5 0 1950- 1955- 1960- 1965- 1970- 1975- 1980- 1985- 1990- 1995- 2000- 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 Birth rate Death rateSource: United Nations, World Population Prospects: The 2004 Revision, 2005.
  • 9. Notes on Birth and Death Rates, Worldwide• Birth rates and death rates are decliningaround the world. Overall economicdevelopment, public health programs, andimprovements in food production anddistribution, water, and sanitation have led todramatic declines in death rates. And womennow have fewer children than they did in the1950s.• Nevertheless, if death rates are lower thanbirth rates, populations will still grow.• Also, it is possible for absolute numbers ofbirths to increase even when birth rates decline.© 2006 Population Reference Bureau

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