Population size
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Population size Per person consumption / impact Stewardship. During this class period the world population will grow by about ~10,000 people!. What happened in the 1800-1900?. Pasteur discovers “germs” cause disease. Sanitation Hygiene. Lower mortality, especially infants and children.

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Population size

Per person consumption / impact


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What happened in the 1800-1900? about ~10,000 people!

Pasteur discovers “germs” cause disease



Lower mortality, especially infants and children

Medical technology



Improved nutrition

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Population Equilibrium about ~10,000 people!



IF, population not changing:

Births = Deaths

IF, deaths go down, and births don’t change,

population will………..

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Industrialized countries about ~10,000 people!: US, Canada, Japan, western Europe, Austrialia, Scandinavia, Singapore, Taiwan, few Arab nations

Middle income, moderately developed countries: Latin America, northern & southern Africa, Eastern Europe, parts of Asia

Developing low income countries: west, central and east Africa, parts of Asia

??? China & India

Per person resource consumption

Population growth

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Population size about ~10,000 people!

Per person consumption / impact


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Fig 6-4 about ~10,000 people!

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Time to add billion people changes about ~10,000 people!

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Independence from British colonization In 1960 about ~10,000 people!

Long period of civil war, based on ethnic lines followed

Discovery of Oil lead to revenue for government, corruption became rampant

1993 General Sani Abacha became military ruler, died in 1998 of a “heart attack”

1999 Olusegun Obasanjo, a former military leader and - until 1998 - a political prisoner, was elected president.

Several rival groups have had violent conflict, eg Igbo Christians and Hausa Muslims over implementation of Muslim law

Obasanjo elected again in 2003, but independent observers expressed reservations

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-Hausa and Fulani (29%) about ~10,000 people!

-Yoruba (21%)

-Ibo (18%)

-Ijaw (10%),

-over 250 others

Nigeria has substantial oil wealth (OPEC), but one of the world's poorest nations, > 70% poverty

Economy heavily dependent on oil sector revenues, which account for nearly 80 % of government revenues.

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Oil facility in Niger Delta, BBC about ~10,000 people!

9 oil workers currently being held by militant group

Picture of Niger Delta on Chevron website

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How many people in Nigeria? about ~10,000 people!

Last Nigerian census in 1991

Newer census postponed due to controversy over ethnicity and religion

Leaders in Muslim north opposed census if questions on religion or ethnicity included.

Leaders in Christian & Animist south opposed census if questions on religion or ethnicity NOT included.

Past, census figures claimed to be manipulated for political advantage.

The population of 2 south areas said to be less than that of the north. Therefore the north was - and still is - assured of absolute control of the federal government & budget

South says that dry north cannot have more people than fertile coastal area

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6-4 about ~10,000 people!

Population momentum

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2000 about ~10,000 people!





U.S. Census Bureau

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“Graying” in Italy- listen to story about ~10,000 people!


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Comparing projected populations about ~10,000 people!

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Demographic transition about ~10,000 people!

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World regions in the process of demographic transition about ~10,000 people!

birth rate

death rate

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Women’s education level lowers fertility rate about ~10,000 people!


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Wangari Maathai about ~10,000 people!

Kenyan environmental activist wins 2004 Nobel Peace Prize

Fights against deforestation

(associated with high population)

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Wangari Maathai about ~10,000 people!

Born in 1940 in in Kenya, received higher education in US

Founded the Green Belt movement in Kenya in 1977, planted more than 10 million trees

1997 unsuccessfully ran for the presidency of Kenya

1998, gained worldwide attention when Kenyan President Daniel arap Moi backed development of a luxury housing project begun by clearing hundreds of acres of forest

1999 she suffered head injuries when attacked while planting trees in the Karura Public Forest in Nairobi

2002 elected to Parliament, as Mwai Kibabi defeated Moi, who had been president for 24 years 

2004 won Nobel Prize for peace