Lecture 4- January 11th

Lecture 4- January 11th - January 11, 2012 Population and...

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January 11, 2012 Population and environmental management When dealing with environmental issues that are global in nature: end up categorizing countries on basis of different variables o Often wealth is one of them o Difficult to separate countries between developed and developing In 2010: o Income per person (x-axis) o Life expectancy (y-axis) o The general trend showed: poor, die young + rich, die older o There is a huge cloud in the middle that was present Calling any of these countries in the middle – developing countries make no sense if you look at the life expectancy Need to focus where the problem lies – eg. Africa o The size of the circle is population based o In 2010: Canada’s life expectancy is about 80-81 If we look back 100 years or so- in 1900: on average people were expected to live until 50 Poor lookout, short life o Another generalization used a lot (indicated by image to left) o Industrialized countries like Western Europe, Canada and the US has gone through this o The image to left is the best model that shows how countries become wealthier and industrialized and how the population picture changes o Allows us to get countries across this wealth barrier without them having to deal with a population barrier o The preindustrialized period: o When population was low, high birth rate but high death rate o High equilibrium- both death and birth rates are high Industrialized period: when the graph steeps upward o First thing that falls is death rate o Health care + medicine become affordable and the benefits of technology and industrial society are starting to be felt but are insufficient to outweigh the desire to have large families o Birth rate however did not fall down that fast
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o Large families are an advantage in underdeveloped countries- more labour
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This note was uploaded on 03/18/2012 for the course BIO 3UU3 taught by Professor Dr.rollo during the Spring '12 term at McMaster University.

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Lecture 4- January 11th - January 11, 2012 Population and...

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