ENV100Y5 Lecture Notes - Lecture 23: Ecological Footprint, Demographic Transition, Biocapacity

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20 Jul 2016
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ENV100Y5 Full Course Notes
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Demographers study: population size, density distribution, age, sex etc. Looking at growth rate: per capita ( birth rate+ immigration) (mortality rate + emigration / population size. Absoloute: size of population at a given time / by size at an earlier time. Many young result in many off spring doubling rate = 70% growth rate if population is growing at 7%/year it will take 70/5 or about 10 years to double. He was wrong because: resource availability has been greatly increased as a resultof technological advances and people have managed to make decisions that give them some measure of control over population growth. Demographic transition model explains populations changes in ndustrializing countries. Low growth does not mean fewer people (yet) Higher fertility and growth rates lower contraceptive use. 99% of next billion people will be born in regions least able to support t hem poverty often results in environmental degradation population, affluence and technology affect the environment.

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