Population Concentration - The population of the world, although spread out, is not distributed evenly. The majority of Earth's population can be found clustered in four regions. These regions are East Asia, Southeast Asia, South Asia, and Western Europe. These four regions possess similar characteristics that are cause for their magnitude of inhabitants. For example, all of these regions are located either near an ocean or near a river with easy access to an ocean, rather than being landlocked. All four regions are located in areas with low elevations that possess mild climates and fertile soil, and all regions are located in the Northern Hemisphere.
Sparsely Populated Regions - Certain regions of the world are undesirable for humans to occupy. The North and South poles of Earth are unoccupied due to the harsh weather and temperatures. However, areas that are extremely dry, wet, or mountainous to the point of hindering agriculture also tend to be uninhabited. Although the area of Earth possessing permanent human settlement is expanding, approximately 75% of the world's population lives on only 5% of the Earth's surface.
Population Density - Density can be described as the number of people occupying an area of land, and can be computed in several ways, including arithmetic density, physiological density, and agricultural density. Geographers use this density information to help determine the distribution of people in comparison to the resources available in a region.
Sub Topics:
Demography - The scientific study of population characteristics
Overpopulation - The number of people in an area exceeds the capacity of the environment to support life a a decent standard of living.
One method of displaying population distribution is through a population cartogram, which, as shown below, displays countries based on population size rather than by size of actual landmasses.
The map below displays a 15th century map by Ptolemy of what was considered an ecumene at that time. Centuries of development and expansion have allowed the current ecumene to be nearly worldwide.
Arithmetic Density: The total number of people divided by the total land area.
Arithmetic density is the most commonly used principle because it's criterion are easy to acquire and results are easily comparable.
Physiological Density: The number of people per unit area of arable land.
This relationship informs geographers of the amount of pressure placed on the land in a region.
Agricultural Density: The ratio of the number of farmers to the total amount of land suitable for agriculture.
More developed countries tend to have lower Agricultural density because technology allows more work to be done by fewer laborers.
Details:
The article below is a perspective result of today's world's overpopulation. It is possible that, even in developed countries such as the United States, overpopulation could cause a downfall of society.
Overpopulation Basis of Problems
The video link below is American philosopher Noam Chomsky's view on globalization and international sharing of intellectual and economic ideas.
Noam Chomsky on Globalization
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