EVPP 111 Lecture - Populations - Human Population Issues - Growth - Student - Fall 2010

EVPP 111 Lecture - Populations - Human Population Issues - Growth - Student - Fall 2010

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EVPP 111 LECTURE DR. LARGEN Human Population Issues:  Growth
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Video: Overview of Human  Impact on Environment
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Human Population Issues - Growth growth rate age structure factors that affect growth rate
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Human Population Issues - Growth Growth rate populations grow (+) or decline  (-) four factors  births deaths immigration emigration
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Human Population Issues - Growth Growth rate population change= (births + immigration) - (deaths + emigration) = zero factors balance out zero population growth (ZPG)
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Fig. 7.1
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Human Population Issues - Growth Growth rate based on  birth rate =   # live births/1000 people death rate  # deaths/1000 people
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Rates of birth, death, and natural increase per 1,000 population 0 5 10 15 20 25 30 35 40 1950- 1955 1955- 1960 1960- 1965 1965- 1970 1970- 1975 1975- 1980 1980- 1985 1985- 1990 1990- 1995 1995- 2000 2000- 2005 Birth rate Death rate Natural Increase Source: United Nations, World Population Prospects: The 2004 Revision , 2005. Birth and Death Rates, Worldwide
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Global Per. P.167
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Human Population Issues - Growth Growth rate demographers use natural rate of increase  =  ((birth rate-death rate)/1000) x 100
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Global Per. P.167
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Human Population Issues - Growth Growth rate birth rate affected by fertility total fertility rate (TFR) Avg # children per woman in her  lifetime replacement fertility rate 2.1
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Worldwide 0.6 0.9 1.8 2.0 2.0 1.3 0 1 2 3 1950-1955 1970-1975 1990-1995 2010-2015 2030-2035 2045-2050 Billions 0 1 2 3 4 5 6 Children per woman Women 15 to 49 Average number of children per woman Source: United Nations, World Population Prospects: The 2004 Revision (medium scenario), 2005. Women of Childbearing Age and Fertility
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Diverging Trends in Fertility Reduction Average number of children per woman 5.7 5.2 5.4 6.4 6.4 8.5 5.3 3.3 6.2 3.1 2.4 2.1 4.3 2.5 Egypt India Indonesia Iran Pakistan Turkey Yemen 1970-1975 2000-2005 Source: United Nations, World Population Prospects: The 2004 Revision , 2005.
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Global Per. P.167
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iClicker Question Which of the following correctly gives the formula  for determining population change? A.  (births + immigrations) – (deaths + emigrations) B.  births + deaths + immigrations + emigrations  C.  births - deaths - immigrations - emigrations D.  (births + deaths) – (immigrations + emigrations)  E.  births + immigrations – deaths + emigrations 
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