Limits of Growth

Theories on Environmental Change

  • Discuss the nature of environmental change and its causes.
  • Explore the role of humans as either agents or solutions to environmental change.

Technology, Population Growth and Management

Environmental Views

  • Technocentric View:
    • Sees human-environment interactions needing minor modifications.
    • Believes technology and economics will resolve environmental issues.
    • Advocates for responsive political and educational systems within existing structures.
  • Ecocentric View:
    • Attributes environmental issues to ethical and moral attitudes towards nature.
    • Advocates for a fundamental change in worldview, including power redistribution and decentralized systems.

Population Growth and Environmental Change

Significant Milestones

  • 31 October 2011: Birth of the world's 7 billionth baby in India.
  • 15 November 2022: Birth of the world's 8 billionth baby in the Philippines.
  • The United Nations designates symbolic babies to represent population milestones:
    • 5th billion: 11 July 1987, Croatia.
    • 6th billion: 12 October 1999, Bosnia.
    • 7th billion: 31 October 2011, India.
    • 8th billion: 15 November 2022, Philippines.

Population Growth Rates

  • It took 300,000 years to reach 1 billion in 1800.
  • The growth rate accelerated post-1950s (Great Acceleration).
  • Predicted 9 billion by 2037 and 10 billion by 2080.

Malthusian Perspective on Population Growth

  • Robert Thomas Malthus (1766-1834)
    • Claimed population growth exceeds food production leading to natural checks (famine, disease).
    • Key Theories:
    • Population grows geometrically, while resources grow linearly.
    • Predicts eventual resource shortages leading to catastrophe.

Checks on Population Growth

  • Preventative Checks:
    • Birth control, delayed marriage, abortion.
  • Positive Checks:
    • Famine, disease, war.

Malthusian Catastrophe

  • Graph Interpretation:
    • Shows limits of resources against population increase, suggesting crises occur when demands exceed supply.

Validity of Malthusian Theory

  • Have positive checks (e.g., war, famine) occurred?
  • Have preventative measures been effective?
  • Has Malthusian collapse occurred historically? If not, will it occur?

Club of Rome and Limits to Growth

  • Formed in 1972, presented theories related to resource limits.
    • Growth cannot continue indefinitely without ramifications.
    • Emphasizes both population and technology in considering growth limits.

Agricultural Growth and Population

Impacts of Growing Population

  1. Increased daily food consumption.
  2. Rising food requirements complicate sustainability.
  3. Urbanization encroaches on agricultural land.
  4. Unsustainable practices lead to long-term resource degradation.
  5. Water consumption affects irrigation supply.
  6. Migration spreads diseases and alters ecosystems.
  7. Anthropogenic climate change alters agricultural viability.

Population Carrying Capacity

  • Definition: Maximum population supported without degrading future viability.
  • Tragedy of the Commons: Overuse of shared resources leading to their depletion.

Case Study: Rapa Nui

  • Example of Malthusian collapse; deforestation led to resource strain, conflict, and population decline.
  • Recent evidence points to climate change and disease also contributing to collapse, underlining human impact on resources.

Modern Evaluation of Growth Limits

  • A 30-year update to the Club of Rome studies recognized overshoot occurs with delays in political action addressing identified problems.

Critical Thinking

  • Consider other examples of 'Tragedy of the Commons' or historical instances where limits to growth manifested.