Changing Pop. Trends

1
Changing Pop. Trends

• Chapter 9-2

2
Brain Food

• Life expectancy has increased dramatically over
  the past century in more-developed countries.
  Life expectancy in Britain went from 48 for males
  in 1901 to 75 in 2000 and from 49 to 80 for
  females in the same time period. In the united
  States live expectancy has reached over 74 for
  males and over 80 for females.

3
What kinds of problems are caused by rapid human
population growth?

• Environmental problems
• Resources are used at a high rates
• Overwhelmed infrastructure
• Infrastructure - is the basic facilities and
  services that support a community ( water
  supplies, sewer, power, roads, subways, schools,
  and hospitals)

4
3 basic needs of all people

• Clean water
• Burnable fuel
• Land for food
• These are the things most affected by rapid
  population growth

5
Specific problems of rapid growth

• Shortage of fuel wood. Over pop. areas use all
  trees, not just dead branches.
• Africa, Asia and India
• Water and food cant be heated if wood supplies
  are low, causing disease and malnutrition

6

• Unsafe water.
• Water for drinking is also used for washing,
  sewage disposal, causing dysentery, typhoid and
  cholera. Ex. Rio Grande (Mexico/US boarder) and
  Lima, Peru (cholera epidemic 91)
• 1 billion people lacked safe water in 2001
• 3 million died of diseases from water in 2001

7

• Land -
• Shortage of arable land - land for growing crops.
• Land competition between housing, growing food,
  and natural habitats. Ex. Egypts Nile River
  valley
• The world is undergoing urbanization - more
  people living in cities than rural areas

8

• US cities are becoming large metropolitana areas
  - people live in suburban areas but work in the
  cities.
• Problems
• Traffic jams, inadequate infrastructure, less
  farm land, less habitat.

9
A demographically diverse world

• Not all countries are developing or undeveloped.
• Some have modern industries but low incomes.
• Some have stable pop. and education without
  industrialization.
• Some have rapid pop. growth, but are unable to
  improve ed. or economics.
• Least developed countries - not developing, high
  death rate, high birth rates. U.N. is giving aid
  to them to help with their problems.

10
Growth rates

• Relatively stable Pop. Europe, U.S., Canada,
  Russia, South Korea, Thailand, China, Japan,
  Australia, and New Zeland.
• Growing Pop. Asia, contains most of the worlds
  pop.

11
Growth is slowing

• Human pop. is now over 6 billion.
• Demographers predict growth will continue to
  slow.
• Most countries will reach replacement level
  fertility rates by 2050 with a world pop. of 9
  billion.