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World geography

World geography. Sept. 12, 2014. Today. - Population (part 1). “I’m not afraid of nuclear war. China has a population of 600,000,000; even if half of them are killed, there are still 300,000,000 left.” - Mao Zedong, 1956. 20 years later…. Maybe one kid is enough….

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World geography

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  1. World geography Sept. 12, 2014

  2. Today - Population (part 1)

  3. “I’m not afraid of nuclear war. China has a population of 600,000,000; even if half of them are killed, there are still 300,000,000 left.” - Mao Zedong, 1956

  4. 20 years later… Maybe one kid is enough…

  5. The world’s current population 7,000,000,000

  6. The world’s current population 7,000,000,000 (well, actually about 7.2 billion) - How did we get to this number? http://www.youtube.com/watch?v=VcSX4ytEfcE

  7. A few facts about human population - The estimated total number of humans who have ever lived: 108 billion (108,000,000,000). - Approximately 6.7% of all people who ever lived are living today.

  8. A few facts about human population For every 1,000 females… 1,010 males

  9. A few facts about human population - 30% of the world’s population regularly eats with these:

  10. A few facts about human population - One of every three people is Chinese or Indian. 1.39 billion 1.27 billion

  11. A few facts about human population - Half of the world’s people live in China, India, USA, Indonesia, Brazil, and Pakistan.

  12. A few facts about human population - The most densely populated country is: Singapore For every km2, there are 7,300 people.

  13. Human population A key factor to studying and understanding human geography is knowing about human population: Demography: - Where is everyone? - Why do some places have more people than others? - Why does the population increase at different rates? - What about overpopulation?

  14. Where is everyone? 90% of the world’s population lives in the northern hemisphere

  15. Where is everyone?

  16. Where is everyone? 2000 1925

  17. Where is everyone? Today, approx. 53% of the world’s population lives in urban areas.

  18. Reporting population Several ways of doing this: • Population • Population density (arithmetic) • Physiological population density

  19. Population density (arithmetic) Simply the population size relative to land size (also called “crude density”). • Provides some insight into population, but does not provide the whole picture.

  20. Population density (arithmetic) Provides some insight into population, but does not provide the whole picture. e.g.

  21. Population density (arithmetic)

  22. Physiological population density Number of people per unit of area of arable land. Arable land = farmland (productive agriculture)

  23. Physiological population density Number of people per unit of area of arable land. - e.g. Egypt

  24. Arithmetic vs. Physiological pop. density e.g.

  25. Population distribution • Locations and places where people live. • Often represented on dot maps  Each dot represents a certain number of people. e.g. 100, 1,000, 100,000 - Depends on scale

  26. One dot = 7,500 people

  27. One dot = 50 people

  28. One dot = 500,000 people

  29. Population distribution • Clearly, people are not evenly distributed across the Earth. • Population clusters started where food was grown. • Cities developed from these areas. • Only recently have advances in agriculture and transport technologies allowed for the traditional patterns to change.

  30. World population concentrations Four major concentrations: 1. East Asia - China, Japan, Korea, Taiwan 2. South Asia - India, Pakistan, Bangladesh 3. Europe 4. North America

  31. World population concentrations 1. East Asia - China, Japan, Korea, Taiwan - approx. 1.5 billion (22% of the world’s pop.)

  32. World population concentrations 2. South Asia - India, Pakistan, Bangladesh - approx. 1.5 billion

  33. World population concentrations 3. Europe - approx.. 750 million

  34. World population concentrations More than 4 billion of the world’s people are within these three clusters/concentrations. - Referred to as the Eurasian land mass.

  35. World population concentrations 4. North America – USA, Mexico, Canada - approx. 560 mil.

  36. Dynamic population http://www.worldometers.info/world-population/ - The world’s population is growing at a rate of 1.2%/year.- This may seem small, but actually, huge.- rate amounts to 75,000,000 people/year.

  37. Dynamic population The world’s population is growing enormously.- due to shortened doubling time.

  38. Population growth • The percent (%) by which a country’s population grows or decreases. • Many factors affect this: life-style, standards of living, religious views, etc.

  39. Population growth • Natural increase: difference between number of births and number of deaths. • Crude birth rate (CBR) - # of births per year per 1,000 people. - Crude death rate (CDR) - # of deaths per year per 1,000 people.

  40. Natural increase

  41. CBR

  42. Mortality rate

  43. Life expectancy

  44. The demographic transition model

  45. The demographic transition model

  46. The demographic transition model 1. Low-growth stage- High birth rate and death rate lead to population that varies over time, with little long-term population growth. - e.g. The Black Death (14th century)

  47. The demographic transition model

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