Annual growth rate Birth Rate – Death rate Doubling time 70/rate Annual growth rate 1804 -...
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Transcript of Annual growth rate Birth Rate – Death rate Doubling time 70/rate Annual growth rate 1804 -...
Annual growth rate Birth Rate – Death rate
Doubling time 70/rate
Annual growth rate 1804 - 1927 1927 – 1959 1959- 1974 1974-1987 1987-1999 1999-2011
Most of human history was in a state of dynamic equilibrium.
Human Pop. Growth Over Time Why the sudden increase?
Deaths declined Medical advancesVaccines: 1730 Cell Theory: 1870Penicillin: 1928
Opposing social viewpoints THOMAS
MALTHUS
Reproduce faster than food is produced
Overpopulation
Depletion of natural resources, unemployment
Increase Environmental Resistance
A Modest Proposal
KARL MARX
Unequal distribution of wealth
Poverty
Overpopulation
Take from the rich and give to the poor
Communist Manifesto
Human condition
Results
Which causes
Solution
Does population growth cause harm?
YES
It puts a burden on our finite resources
1.2 billion do not have safe water to drink
Greater resource demand
Larger cities
More pollution
Greater chance of diseases spreading
.
NO
Overconsumption is the issue
For ever mouth, there are a pair of hands and that will find a solution for their needs.
Opportunity for human prosperity
Economic , technological growth
….
Demographers ask is there “overpopulation”?
Population Density versus Population Cultural Carrying Capacity (I = P*T*A)
We can fit into TX. World's population 7,000,000,000. The landmass of Texas
7,500,000,000,000 sq. ft. How many square feet does each person
get? How much of an acre (43,560 sq.
ft./acre)?
Demographers ask, Is there overpopulation? Which causes more harm to the
environment, high population growth rates or
overconsumption ?
Different growth rates = Different problems
Rapid growth▪ Migration to cities. Increases poverty, crime,
disease▪ Money is diverted from education, infrastructure
Negative growth▪ Graying population▪ Economic declines
Population Pyramids:
What is the “correct”growth rate?
Fertility rates 1.0, 2.1, or 6.o
What decides? Religion Economy Government Carrying capacity
How to achieve the correct growth rate Policy
Focus on population size Focus on social justice
Government Equal rights, empower women India: forced sterilizations
Religious Pres. Bush eliminated funding for Planned
Parenthood Economics
Demographics transition