Population size is not the only factor that determines our species impact on the environment.
- Resource use and pollution
- Amount of wealth
- Resource desire
- Resource need
Changes
4 main factors for population changes:
- Birth rate
- Death rate
- Inmigration
- Emigration
The measures of population change are:
- Crude birth rate or CBR = (Number of births)/(Total population) * 1000
- Crude death rate or CDR = (Number of births)/(Total population) * 1000
- Natural increase rate or NIR = (CBR-CDR)/10
- Doubling rate = 70/NIR
- Total fertility rate: The number of children every woman is having in a determined area. The total fertility rate in the world is 3, 1.7 in MEDCs and between 3 and 6 in LEDCs
- Also important to note: Population density = (Total population)/(Total area)
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