The Next Unit

Population Concentrations
- 2/3 of the world's inhabitants are clustered in five regions: East Asia, South Asia, Southeast Asia, Europe, and Africa.
Site and Situation of Population Clusters
- Low-lying areas with fertile soil and temperature climate.
- Near an ocean or near a river with easy access to an ocean.
Sparsely Populated Regions
- Humans avoid clustering in certain physical environments: Dry Lands, Wet Lands, Cold Lands, and High Lands.
- Places considered too harsh for occupancy have diminished over time.
Population Density
- Density can be computed in up to three ways for a place; 1) Arithmetic Density - total number of objects in an area, computation: divide the population by the land area; 2) Physiological Density - number of people supported by a unit of arable land; 3) Agricultural Density - ratio of the number of farmers to amount of arable land, computation: divide the population of farmers by the arable land area.
Components of Population Growth
- Geographers measure population change in a country or the world as a whole by using three measures: Crude Birth Rate, Crude Death Rate, Natural Increase Rate.
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