ENV100Y5 Lecture Notes - Lecture 26: Doubling Time, Demographic Transition, Sustainable Development

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ENV100Y5 Full Course Notes
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Demography is the study of human populations: demographers study, population size, density and distribution, age structure, sex ratio, birth, death, immigration, emigration rates. Demography: study of factors determining size & structure of population. 2 ways to look at growth rate: per capita rate = (birth rate + immigration) (mortality rate + emigration) Population size: negative = population shrinking, zero = population is not changing in size, positive = population is growing, absolute rate = size of a population at a given time. Size of a population at an earlier time: <1 = population shrinking, 1 = population is not changing in size, >1 = population is growing. Age distribution: age distribution reflects future growth potential, 2006 - 2011: fastest growing segment of ontario"s population was the 85+ age group, number of 65+ grew by 14% from 2006 2011. Doubling rate: doubling time 70/(growth rate %, e. g. if the population is growing at 7%/year, it will take 70/5 or approximately.

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