ENV100Y5 Lecture Notes - Lecture 21: Global Hectare, Doubling Time, Biocapacity

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ENV100Y5 Full Course Notes
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Demography: study of factors determining size and structure of human population, demographers study, population size, density and distribution, age structure, sex ration, birth, death, immigration and emigration rates. Age distribution: reflects future growth potential, many individuals in young age groups results in high reproduction and rapid population growth. Doubling rate: per capita rate is the same, when a big population starts to slow, it shows the impact comparing to smaller population, doubling time = 70 / (growth rate %) Limits to human population growth: resources availability has been greatly increased as a result of technological advances, people have managed to make decisions tat give them some measure of control over population growth. Four phases in industrialized countries: pre-industrial stage, birth rate and death rate are high, transitional stage, death rate declines due to increased food production and improved medical care, industrial stage.

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