Some geographers identify two density divisions: ecumene, referring to the inhabited areas of the world; and non-ecumene, referring to the uninhabited or very sparsely inhabited areas.
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The former, it is estimated, covers about 60% of the total land surface, and the latter about 40%. However, such a generalised, twofold system is open to criticism;
Problem: There is, for example. The difficulty of delimitation. Areas of very dense population (>100 persons/km2)
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1. East Asia comprising the world’s most populous country China, Japan and Korea
There, over a billion people occupy some of the world’s most densely inhabited rural area and most rapidly expanding cities
Highly productive agricultural techniques make the heavy rural densities possible.
Labour intensive industries and/or highly specialised industrial types are being developed to increase the area’s ability to support such a huge population.
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2. South Asia comprising India, Pakistan, and Bangladesh
3. Countries of Northwestern Europe
4. Regions between the Great Lakes and Atlantic coast of Northeastern United States.
5. Singapore (4670 persons/Km2, world’s most densely populated country), Nile Valley in Africa, Eastern coast of Brazil, Sri Lanka, and Islands of Java in Indonesia are other small regions of high density.