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Growth Rate and the Rule of 70. G lobal G rowth r ate. Factors: Crude Birth Rate (CBR) and Crude Death Rate (CDR). N ational G rowth r ate. Factors: Crude Birth Rate (CBR), Crude Death Rate (CDR), immigration, emigration. T he R ule of 70. Used to calculate population’s doubling time.
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Global Growth rate • Factors: Crude Birth Rate (CBR) and Crude Death Rate (CDR)
National Growth rate • Factors: Crude Birth Rate (CBR), Crude Death Rate (CDR), immigration, emigration
The Rule of 70 • Used to calculate population’s doubling time