Population Geography - Mrs. Moore...
Transcript of Population Geography - Mrs. Moore...
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Population Geography
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The first hominids roamed eastern Africa 5-7 million years ago.
Humanity has wandered the earth for a very long time.
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The first modern humans walked out of Africa as hunter-gatherers only 70,000 years ago.
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Graph Source: www.census.gov & www.wikipedia.org
At that time there were probably about 1 million humans on Earth
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Graph Source: www.census.gov & www.wikipedia.org
When Darwin published On the Origin of Species there were 1 billion humans
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Graph Source: www.census.gov & www.wikipedia.org
When I was born there were 3.6 billion humans
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The U.S. Census Bureau estimates the world population at:
6,914,504,604 humans today
…and counting!
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Our impacts are growing.
LANDSAT Images 1973 - 2006
Las Vegas, Nevada
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Human Impact on The Environment
Source: Hugo Ahlenius. 2003. UNEP/GRID-Arendal. Global Environmental Outlook 3, 2002.
Human Impact on the Environment, 1700 Human Impact on the Environment, 2002 Human Impact on the Environment, 2032
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Densely Population Areas
• East Asia
• South Asia
• Southeast Asia
• Europe
• North America
WHERE ARE THE PEOPLE DISTRIBUTED?
Sparsely Population Areas
• arid lands
• tropical rainforests
• highlands
• high latitudes
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World and Country Population Totals
Distribution and Structure: 3/4 of people live on 5% of earth's surface!
Total: 6.8 billion on planet as of March 5, 2010 Current World Population Counter from U.S Census Bureau
Five most populous regions and countries
REGION POPULATION COUNTRY POPULATION ✦ East Asia 1.6 billion China 1.3 billion ✦ South Asia 1.5 billion India 1.1 billion ✦ Europe 1 billion U.S. 300 million ✦ SE Asia 600 million Indonesia 250 million ✦ Eastern N. America &
Canada 275 million Brazil 188 million
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Kolkata, India
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Rajasthan, India
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Overpopulation is when there are too many people relative to available resources. Simple density is not the determinant.
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Human Population Projections How many people will the planet eventually support?
The U.S. Census Bureau and the United Nations Statistics Division both agree that world population will level off somewhere between 9 and 11 billion people and then start to fall.
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Rates of Natural Increase
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Total Fertility Rate
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Palestinian Territories Fertility
Rate 1975-1980 7.39 1980-1985 7.00 1985-1990 6.43 1990-1995 6.46 1995-2000 5.99 2000-2005 5.57
2.1 is generally regarded as the replacement rate (the rate at which a population neither grows nor shrinks) in the developed world. In less developed countries this rate should be higher to account for so many children not reaching childbearing age.
Africa
Fertility Rate
1975-1980 6.60 1980-1985 6.45 1985-1990 6.11 1990-1995 5.67 1995-2000 5.26 2000-2005 4.97
U.K. Total fertility rate
1975-1980 1.72 1980-1985 1.80 1985-1990 1.81 1990-1995 1.78 1995-2000 1.70 2000-2005 1.66
Total Fertility Rate - the average number of children a women will have in her childbearing years. This rate varies from just over 1 (Japan, Italy) to around 7 (Niger, Mali). The U.S. rate is 2.
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Infant Mortality Rate – the number of deaths of children under the age of one per thousand live births. The rate ranges from as low as 3 (Singapore, Iceland) to as much as 150 (Sierra Leone, Afghanistan). The U.S. rate is just over 6. High infant mortality tends to result in higher fertility rates as families seek “insurance” for the loss of children.
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World Death Rates ✦ Epidemiological Transition is the shift from
infectious to degenerative diseases that occurs with development.
✦ Infectious diseases (developing world) – HIV/AIDS – SARS – Malaria – Cholera
✦ Degenerative diseases (developed countries) – Obesity – Tobacco use
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Adults and Children Living with HIV/AIDS, mid-2006
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Life Expectancy
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Life Expectancy
✦ Rapid increase throughout world
✦ Infant mortality rate declining in most countries
✦ Antibiotics/immunization ✦ Increasing standards of
living
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Influences on Birth Rates ✦ Family planning
programs – India, Thailand, Bangladesh, etc.
✦ Contraceptive technology
✦ Role of mass media – Radio/TV Soap Operas
("Twende na Wakati" in 1990s Tanzania, which means "Let's Go with the Times" Government Billboard, Indonesia
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Population Pyramids Population Pyramids quickly show
• age distributions
• demographic booms and busts
• sex ratios
• dependency ratios
Wide base depicts young population; narrow base suggests declining birth rates or growing elderly population.
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