ENV100Y5 Lecture Notes - Demographic Transition, Ecological Footprint, Earth Overshoot Day
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ENV100Y5 Full Course Notes
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Document Summary
The human population is growing nearly as fast as ever. Population growth in developing countries led to global population toward 7 billion and beyond. The global human population has grown exponentially; even if growth rate remains steady, population size will increase by greater increments with each successive generation. Demography is the study of human populations d. Demography- study of factors determining size and structure of population. Two 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 population at a given time/size of population at an earlier time: <1= population shrinking, 1= population is not changing in size, <1= population is growing. Many individuals in young age groups results in high reproduction and rapid population growth. E. g. if the population is growing at 5%/year, it will take 70/5 or almost 14 years.
