1. Section 2 – Changing Population Trends
The Human Population
Section 2 – Changing Population Trends

2. Changing Population Trends
High rates of growth create environmental problems.
Growing population - uses resources at an increased rate
Overwhelm the infrastructure of a community.

3. Infrastructure
Infrastructure - basic facilities of a country or region
Roads, bridges, sewers, power plants, subways, schools, and hospitals.

4. Problems of Rapid Growth
Resources are used faster than the environment can renew
Standards of living decline
Wood removed from forests
Waste overwhelm water sources

5. A Shortage of Fuelwood Poor countries – wood is main source of fuel
Stable populations – deadwood
Unstable – live trees
Africa, Asia, and India

6. A Shortage of Fuelwood
Without fuelwood - many people suffer from disease and malnutrition
Can’t boil water or cook food

7. Unsafe Water
Water supplies can be used for drinking as well as washing or sewage disposal
Disease
Dysentery, typhoid, cholera

9. Unsafe Water 2001 – Over 1 billion people lacked clean water
3 million died
Example: Rio Grande or Lima, Peru

11. Impacts on Land Arable land – land that can be used to grow crops
Competing uses for land: housing, agriculture, or natural habitats

12. Arable Land in Egypt on the Nile
4% is arable

13. Urbanization
Urbanization – movement of people from rural areas to cities
Work in city and live in suburbs
Suburban sprawl – reduction in lands

16. A Demographically Diverse World
More developed vs less developed
Factors include: education, industry, income, etc
Least developed countries – show few signs of development, increasing death rates, and high birth rates

17. Growth Rates

18. Managing Developing and Population Growth
Population growth can limit economic development
China, Thailand, and India have try to limit birth rate
Public advertisements
Planning programs
Economic incentives
Legal punishments

20. Worldwide fertility rates are dropping

21. Growth is Slowing Human population – 6 billion and growing
Now closer to 7
87 million per year – to 1990
81 million per year – to 1995

22. Growth is Slowing Fertility Rates declined around 1970
Higher in less developed regions

23. Projections to 2050