Population, Urbanization, and Environment

Population, Urbanization, and Environment - Population...

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Population, Urbanization, and Environment Fertility – incidence of childbearing in a country’s population Crude Birth Rate – the number of live births in a given year for every thousand people in a population # of live births in one year ÷ total population × 1000 2006 – 8.1 Infant mortality rate – number of deaths among infants under one year of age for every thousand live births in a given year Life expectancy – average lifespan of a society’s population Migration – movement of people into and out of a specified territory Immigration – movement into a territory Emigration – movement out of a territory Population growth – CBR – CDR = natural growth rate U.S. 2006 natural growth rate – 6 per thousand (0.006 or .6%) Population Composition – makeup of a society’s population at a given point in time Sex ratio – number of males for every 100 females 2007 – 97:100 Countries with a preference for sons lead to a skewed sex ratio How: o Female infanticide o Benign neglect o Abandonment of girls o Use of ultrasounds Female fetuses are aborted Traditionally:
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