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World Population - PowerPoint PPT Presentation


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World Population. Population Growth. The world population has increased rapidly in the past two centuries, creating many new challenges. Some Facts……. The first billion took from the dawn of humanity until 1830 . The second billion took only 100 years -- from 1830 to 1930.

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population growth
Population Growth

The world population has increased rapidly in the past two centuries, creating many new challenges

slide4

Some Facts…….

  • The first billion took from the dawn of humanity until 1830.
  • The second billion took only 100 years -- from 1830 to 1930.
  • Three billion more arrived in the next 60 years.
  • The next billion will take only 13 years (yes, just 13 years!)
  • Every second, 5 people are born and 2 people die, a net gain of 3 people
  • The world’s population is growing by 200,000 people a day.
slide5

More Facts…….

  • 90 % of the World’s population is in the northern hemisphere.
  • 50% live in cities.
  • 50% lives in Asia, it is about 20% of earth’s land area.
slide7

Why has the population grown so much?

Birth

rate

Death rate

Better health care, better living situations, more food

slide8

1. Famine: not enough food to go around

Why is population growth a challenge?

2. Resources: not enough services to go around

slide9

So Where do all these people live?

Population Density

http://www.youtube.com/watch?v=s9dFy6xBOBM

slide14

Movement:

  • Internal Migration: Movement within a country
    • Urbanization: movement from farms and villages to cities
  • The global proportion of urban population rose dramatically from 13% in 1900, to 29% in 1950, to 49% in 2005.
slide15

Immigration vs Emigration

  • Emigrate (Exit): people leave a country
  • Immigrate (Go Into a Country): when people come into a country.

*If I move from the U.S. to Canada, I emigrate from the U.S. and immigrate to Canada. To Canada, I am an immigrant.

slide16

PUSH FACTORS

What drives people away from a place

PULL FACTORS

What draws people to a new place

slide17

Push factors

  • Shortage of farmland
  • Shortage of jobs
  • War
  • Intolerance
  • Lack of freedom
  • Natural disasters

Pull factors

  • Jobs
  • Peace
  • Tolerance
  • Freedom
  • Health care