Population Growth and Change

1
Population Growth and Change

• Chapter 23 Lesson 1

2
Population Growth

• Mexico City was the most populated city in the
  world in the late 20th century.
• Happening all over the world.
• At the beginning of the second millennium the
  population was around 6 billion people.
• A millennium is one thousand years.
• When your grandparents were in school the
  population was about half of what it is now.

3
Population Growth

• Many people are moving to the city from the
  country.
• Cities offer more job opportunities than rural
  areas.
• Cities are growing so fast that they cannot
  provide the basic necessities of life.
• Clean water and housing.

4
Population Growth

• By 2000 their were more than 20 megacities in the
  world.
• A region with 10 million or more people.
• Calcutta
• Megacity
• One of the worlds poorest cities.
• 600,000 people are homeless.
• Mother Teresa
• Roman Catholic nun who worked in Calcutta for
  more than 40 years.
• Set up soup kitchens, hospices, homeless
  shelters.
• Received the Nobel Peace Prize in 1979 for her
  work in Calcutta.
• Do not wait for leaders do it alone, person to
  person.

5
Population Movement

• Migration of people from rural to urban areas
  increased during the Industrial Revolution.
• More people moved from the countryside to the
  cities in the first half of the twentieth
  century.
• Economic opportunities

6
Population Movement

• By the 1960s people began moving from developing
  counties to more developed countries.
• Seeking a better life.
• Populations in developing countries were growing
  so fast that governments could no longer provide
  housing or clean water.
• Unemployment is high in developing countries.
• Madagascar
• Population is increasing at more than 3 per
  year.
• Population will double in less than 25 years.
• United States
• Population is increasing at about 0.9 per year.
• Population will double in about 77 years.

7
Immigration

• Population changes are important because they
  affect how people live and work.
• Scientist who study population trends
• Demographers
• Many demographers believe that the status of
  women affects the rate of population growth.
• Developed countries often have good opportunities
  for education for women.
• Educated women have children later and fewer of
  them.
• Developing nations have fewer opportunities for
  jobs and education.

8
Immigration

• Immigration
• Process of people moving to a new country to stay
  permanently or for a long time.
• Changing the cultures of many developed
  countries.
• France
• Received many immigrants from former French
  Colonies in North Africa.
• Now one of their national foods is couscous
• Some demographers now believe that more people in
  France now attend mosques than churches.

9
A Population Explosion?

• Some demographers spoke of a population
  explosion.
• Like the explosion of a bomb.
• Painted very grim pictures of the worlds future.

10
A Population Explosion?

• Today, many scientist see evidence of slowing
  population growth.
• Zero Population growth has been achieved in some
  developed countries.
• Just enough babies are born to balance population
  loss.
• Some demographers even think that by later in the
  twenty-first century, the worlds population may
  begin to shrink.