GEG 1302 Lecture Notes - Lecture 8: Human Reproduction, Thomas Robert Malthus, Shortage
11 Apr 2018
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Document Summary
Past, conceded with famine, insuf cient food production and disease. Current, concerned with capacity of the global environment to sustain a large population. Enormous amount of wast (greenhouse gases, physical waste, waste water) Natural increase: the different between births and deaths. Population growth: term used when this increase (natural) is expressed a rate that is as a percentage change over time. Medical: began to change in 1796 (vaccines for smallpox, rabies and anthrax) Arti cial nitrogen about doubles amount of plant nutrient that nature can provide. Thomas robert malthus principle of population: theorized that food supply was the critical factor limiting population growth. Break population into subgroups according to age and sex cohorts. Cohort: group of individuals who share a common temporal demographic experience. Transition model based on historical population trends of two demographic characteristics birth rate and death rate to suggest that a country"s total population growth rate cycles through stages as that country develops economically.
