what do you mean by Arithmetic Density of
population? explain geographical & economic
factors affecting population density in the
world?
Answers
Answer:
Population density (in agriculture: standing stock and standing crop) is a measurement of population per unit area, or exceptionally unit volume; it is a quantity of type number density. It is frequently applied to living organisms, most of the time to humans. It is a key geographical term.[1] In simple terms, population density refers to the number of people living in an area per square kilometre.
Explanation:
Population density (people per km2) map of the world in 1994. In relation to the equator it is seen that the vast majority of the human population lives in the Northern Hemisphere, as 67% of the Earth's land area is there.
Population density is the number of people per unit of area, usually quoted per square kilometre or square mile, and which may include or exclude for example areas of water or glaciers. Commonly this may be calculated for a county, city, country, another territory or the entire world.
The world's population is around 7,500,000,000[3] and Earth's total area (including land and water) is 510,000,000 km2 (197,000,000 sq. mi.).[4] Therefore, the worldwide human population density is around 7,500,000,000 ÷ 510,000,000 = 14.7 per km2 (38 per sq. mi.). If only the Earth's land area of 150,000,000 km2 (58,000,000 sq. mi.) is taken into account, then human population density is 50 per km2 (129 per sq. mi.). This includes all continental and island land area, including Antarctica. If Antarctica is also excluded, then population density rises to over 55 people per km2 (over 142 per sq. mi.).[1] However, over half[citation needed] of the Earth's land mass consists of areas inhospitable to human habitation, such as deserts and high mountains, and population tends to cluster around seaports and fresh-water sources. Thus, additional criteria are needed to make simple population density values useful.
Several of the most densely populated territories in the world are city-states, microstates and urban dependencies.[5][6] In fact, 95% of the world's population is concentrated on just 10% of the world's land.[7] These territories have a relatively small area and a high urbanization level, with an economically specialized city population drawing also on rural resources outside the area, illustrating the difference between high population density and overpopulation.
Deserts have very limited potential for growing crops as there is not enough rain to support them. Thus their population density is generally low. However some cities in the Middle East, such as Dubai, have been increasing in population and infrastructure growth at a fast pace.[8]
Cities with high population densities are, by some, considered to be overpopulated, though this will depend on factors like quality of housing and infrastructure and access to resources.[9] Very densely populated cities are mostly in Asia (particularly Southeast Asia); Africa's Lagos, Kinshasa and Cairo; South America's Bogotá, Lima and São Paulo; and Mexico City and Saint Petersburg also fall into this category.[10]
City population and especially area are, however, heavily dependent on the definition of "urban area" used: densities are almost invariably higher for the centre only than when suburban settlements and intervening rural areas are included, as in the agglomeration or metropolitan area (the latter sometimes including neighboring cities).
In comparison, based on a world population of 7 billion, the world's inhabitants, as a loose crowd taking up almost 1 m2 (10 sq. ft) per person (cf. Jacobs Method), would occupy a space a little larger than Delaware's land area.