Shape Column Growth Slow Shape Extended Triangle Growth

Shape: Column Growth: Slow Shape: Extended Triangle Growth: Moderate Shape: Reduced Pentagon Population Pyramids: Shapes Shape: Triangular Growth: Fast Sessio n

• Theory: • People need food to survive and have natural desire to reproduce • Food production increases arithmetically and population increases exponentially • Conclusion: • Predicted population growth would eventually outpace people’s ability to produce food leading to mass starvation and famine Time Resources Needed Today 1 person-1 unit of food 25 years from now 2 persons-2 units of food 50 years from now 4 persons- 3 units of food Malthus and Overpopulation • Thomas Malthus – 1798 wrote “Essay on the Principle of Population” Sessio n

• Sustainability: As the world approaches 10 billion people, ecological problems will make food demand difficult to meet • Increasing Per Capita Demand: Amount of food person is rising MDC citizens consume eight times the amount someone in an LDC consumes • Natural Resource Depletion: Overconsumption of resources other than food may lead to an insufficient supply when the population hits 10 billion Paul Erlich – most prominent neo. Malthusian. Wrote “Population Bomb” Neo-Malthusians • Neo-Malthusians argue that 3 characteristics of recent population growth makes Malthus’ argument even more frightening Sessio n

• Invention: Food production increased because of tractors, artificial fertilizer, pesticides, irrigation techniques, plant and animal hybridization, refrigeration and canning • Family Planning: Malthus did not foresee family planning and birth control and leading to a drop in CBR and NIR • Scarcity/Distribution: Malthus did not recognize that famine is usually NOT related to a lack of food but to unequal distribution of food Malthus and Overpopulation • The disastrous end to humanity predicted by Malthus did not occur according to his critics for the following reasons: Sessio n

• Carrying Capacity: The number of people a given area can maintain • Overpopulation, therefore, implies a breach of an area’s carrying capacity, due to… • Over consumption of resources • Inefficient allocation of goods • Unsustainable land use • MDC’s blame LDC’s for having too many babies while LDCs blame Carrying Capacity • If surpassed, the population must decline unless the carrying capacity is raised. Sessio n

• Stage 1: Pestilence and Famine • Infectious diseases run rampant killing a large number of the population • Stage 2: Receding Pandemics • Improved sanitation, nutrition, medicine decreases spread of infectious diseases • Stage 3: Degenerative and Human Created Diseases • Fewer deaths from infectious diseases but an increase in chronic disease associated with aging (heart disease and cancer) • Stage 4: Delayed Degenerative Diseases • Degenerative diseases linger but life expectancy is extended through medical advances (bypass, radiation, chemo, etc. ) • Stage 5? : Reemergence of Infectious and Parasitic Diseases • Evolution of new strains of bacteria (TB, polio, malaria) that are diffused faster due to globalization with a select few able to pay for the treatment Epidemiological Transition Model • The stages of the Epidemiological Transition Model follows the same path as the Demographic Transition Model. Sessio n

China’s Lost Girls • Directions: • There is no video guide, but students are expected to write down 5 impressions and/or questions that they have from the documentary. http: //www. snagfilms. com/films/title/chin as_lost_girls Video Sessio n