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Human Population

Human Population . Most of human history was in a state of dynamic equilibrium. . 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. Human Pop. Growth Over T ime .

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Human Population

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  1. Human Population

  2. Most of human history was in a state of dynamic equilibrium. • 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

  3. Human Pop. Growth Over Time • Why the sudden increase? • Deaths declined • Medical advances • Vaccines: 1730 • Cell Theory: 1870 • Penicillin: 1928

  4. Opposing social viewpoints Human condition Thomas Malthus Karl Marx Unequal distribution of wealth Poverty Overpopulation Take from the rich and give to the poor Communist Manifesto • Reproduce faster than food is produced • Overpopulation • Depletion of natural resources, unemployment • Increase Environmental Resistance • A Modest Proposal Results Which causes Solution

  5. … . Does population growth cause harm? Yes 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 • 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 .

  6. Future population predictions • World population growth rate peaked in 1960’s, then began to decrease

  7. 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)?

  8. Demographers ask, Is there overpopulation? • Which causes more harm to the environment, high population growth rates or overconsumption ?

  9. Population Pyramids: 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

  10. What is the “correct”growth rate? • Fertility rates • 1.0, 2.1, or 6.o • What decides? • Religion • Economy • Government • Carrying capacity

  11. 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

  12. Achieving the correct growth rate • Demographic transition

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