Human Populations. Melody Bender . F actors that affect Human Populations: . Historical Population Sizes Population Distribution Fertility Rates Growth Rates Doubling Times Demographic Transition. http://www.youtube.com/watch?v=sc4HxPxNrZ0. Historical Population Sizes.
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Rule of 70
Strategies to sustain population size:
To find the doubling time of a quantity growing at a given rate, divide the percentage number into 70 to obtain the approximate number of years required to double.
70/ 2%= 35 years
Provide economic incentives to have fewer children
Empower and educate women
Education-> Higher incomes-> less children
Higher education leads to having children later in life