The World Factbook
The World Factbook known as the CIA World Factbook, is a reference resource produced by the Central Intelligence Agency with almanac-style information about the countries of the world. The official print version is available from the Government Printing Office. Other companies—such as Skyhorse Publishing—also print a paper edition; the Factbook is available in the form of a website, updated every week. It is available for download for use off-line, it provides a two- to three-page summary of the demographics, communications, government and military of each of 267 international entities including U. S.-recognized countries and other areas in the world. The World Factbook is prepared by the CIA for the use of U. S. government officials, its style, format and content are designed to meet their requirements. However, it is used as a resource for academic research papers and news articles; as a work of the U. S. government, it is in the public domain in the United States. In researching the Factbook, the CIA uses the sources listed below.
Other public and private sources are consulted. Antarctic Information Program Armed Forces Medical Intelligence Center Bureau of the Census Bureau of Labor Statistics Council of Managers of National Antarctic Programs Defense Intelligence Agency Department of Energy Department of State Fish and Wildlife Service Maritime Administration National Geospatial-Intelligence Agency Naval Facilities Engineering Command Office of Insular Affairs Office of Naval Intelligence Oil & Gas Journal United States Board on Geographic Names United States Transportation Command Because the Factbook is in the public domain, people are free under United States law to redistribute it or parts of it in any way that they like, without permission of the CIA. However, the CIA requests. Copying the official seal of the CIA without permission is prohibited by U. S. federal law—specifically, the Central Intelligence Agency Act of 1949. Before November 2001 The World Factbook website was updated yearly. Information available as of January 1 of the current year is used in preparing the Factbook.
The first, edition of Factbook was published in August 1962, the first unclassified version in June 1971. The World Factbook was first available to the public in print in 1975. In 2008 the CIA discontinued printing the Factbook themselves, instead turning printing responsibilities over to the Government Printing Office; this happened due to a CIA decision to "focus Factbook resources" on the online edition. The Factbook has been on the World Wide Web since October 1994; the web version receives an average of 6 million visits per month. The official printed version is sold by the Government Printing Office and National Technical Information Service. In past years, the Factbook was available on CD-ROM, magnetic tape, floppy disk. Many Internet sites use information and images from the CIA World Factbook. Several publishers, including Grand River Books, Potomac Books, Skyhorse Publishing have re-published the Factbook in recent years; as of July 2011, The World Factbook comprises 267 entities, which can be divided into the following categories: Independent countries The CIA defines these as people "politically organized into a sovereign state with a definite territory."
In this category, there are 195 entities. Others Places set apart from the list of independent countries. There are two: Taiwan and the European Union. Dependencies and Areas of Special Sovereignty Places affiliated with another country, they may be subcategorized by affiliated country: Australia: six entities China: two entities Denmark: two entities France: eight entities Netherlands: three entities New Zealand: three entities Norway: three entities United Kingdom: seventeen entities United States: fourteen entitiesMiscellaneous Antarctica and places in dispute. There are six such entities. Other entities The World and the oceans. There are the World. Areas not covered Specific regions within a country or areas in dispute among countries, such as Kashmir, are not covered, but other areas of the world whose status is disputed, such as the Spratly Islands, have entries. Subnational areas of countries are not included in the Factbook. Instead, users looking for information about subnational areas are referred to "a comprehensive encyclopedia" for their reference needs.
This criterion was invoked in the 2007 and 2011 editions with the decision to drop the entries for French Guiana, Martinique and Reunion. They were dropped because besides being overseas departments, they were now overseas regions, an integral part of France. Kashmir Maps depicting Kashmir have the Indo-Pakistani border drawn at the Line of Control, but the region of Kashmir administered by China drawn in hash marks. Northern Cyprus Northern Cyprus, which the U. S. considers part of the Republic of Cyprus, is not given a separate entry because "territorial occupations/annexations not recognized by the United States Government are not shown on U. S. Government maps."Taiwan/Republic of China The name
In biology, a population is all the organisms of the same group or species, which live in a particular geographical area, have the capability of interbreeding. The area of a sexual population is the area where inter-breeding is possible between any pair within the area, where the probability of interbreeding is greater than the probability of cross-breeding with individuals from other areas. In sociology, population refers to a collection of humans. Demography is a social science. Population in simpler terms is the number of people in a city or town, country or world. In population genetics a sex population is a set of organisms in which any pair of members can breed together; this means that they can exchange gametes to produce normally-fertile offspring, such a breeding group is known therefore as a Gamo deme. This implies that all members belong to the same species. If the Gamo deme is large, all gene alleles are uniformly distributed by the gametes within it, the Gamo deme is said to be panmictic.
Under this state, allele frequencies can be converted to genotype frequencies by expanding an appropriate quadratic equation, as shown by Sir Ronald Fisher in his establishment of quantitative genetics. This occurs in Nature: localization of gamete exchange – through dispersal limitations, preferential mating, cataclysm, or other cause – may lead to small actual Gamo demes which exchange gametes reasonably uniformly within themselves but are separated from their neighboring Gamo demes. However, there may be low frequencies of exchange with these neighbors; this may be viewed as the breaking up of a large sexual population into smaller overlapping sexual populations. This failure of panmixia leads to two important changes in overall population structure: the component Gamo demos vary in their allele frequencies when compared with each other and with the theoretical panmictic original; the overall rise in homozygosity is quantified by the inbreeding coefficient. Note that all homozygotes are increased in frequency – both the deleterious and the desirable.
The mean phenotype of the Gamo demes collection is lower than that of the panmictic original –, known as inbreeding depression. It is most important to note, that some dispersion lines will be superior to the panmictic original, while some will be about the same, some will be inferior; the probabilities of each can be estimated from those binomial equations. In plant and animal breeding, procedures have been developed which deliberately utilize the effects of dispersion, it can be shown that dispersion-assisted selection leads to the greatest genetic advance, is much more powerful than selection acting without attendant dispersion. This is so for both autogamous Gamo demes. In ecology, the population of a certain species in a certain area can be estimated using the Lincoln Index. According to the United States Census Bureau the world's population was about 7.55 billion in 2019 and that the 7 billion number was surpassed on 12 March 2012. According to a separate estimate by the United Nations, Earth’s population exceeded seven billion in October 2011, a milestone that offers unprecedented challenges and opportunities to all of humanity, according to UNFPA, the United Nations Population Fund.
According to papers published by the United States Census Bureau, the world population hit 6.5 billion on 24 February 2006. The United Nations Population Fund designated 12 October 1999 as the approximate day on which world population reached 6 billion; this was about 12 years after world population reached 5 billion in 1987, 6 years after world population reached 5.5 billion in 1993. The population of countries such as Nigeria, is not known to the nearest million, so there is a considerable margin of error in such estimates. Researcher Carl Haub calculated that a total of over 100 billion people have been born in the last 2000 years. Population growth increased as the Industrial Revolution gathered pace from 1700 onwards; the last 50 years have seen a yet more rapid increase in the rate of population growth due to medical advances and substantial increases in agricultural productivity beginning in the 1960s, made by the Green Revolution. In 2017 the United Nations Population Division projected that the world's population will reach about 9.8 billion in 2050 and 11.2 billion in 2100.
In the future, the world's population is expected to peak, after which it will decline due to economic reasons, health concerns, land exhaustion and environmental hazards. According to one report, it is likely that the world's population will stop growing before the end of the 21st century. Further, there is some likelihood that population will decline before 2100. Population has declined in the last decade or two in Eastern Europe, the Baltics and in the Commonwealth of Independent States; the population pattern of less-developed regions of the world in recent years has been marked by increasing birth rates. These followed an earlier sharp reduction in death rates; this transition from high birth and death rates to low birth
France the French Republic, is a country whose territory consists of metropolitan France in Western Europe and several overseas regions and territories. The metropolitan area of France extends from the Mediterranean Sea to the English Channel and the North Sea, from the Rhine to the Atlantic Ocean, it is bordered by Belgium and Germany to the northeast and Italy to the east, Andorra and Spain to the south. The overseas territories include French Guiana in South America and several islands in the Atlantic and Indian oceans; the country's 18 integral regions span a combined area of 643,801 square kilometres and a total population of 67.3 million. France, a sovereign state, is a unitary semi-presidential republic with its capital in Paris, the country's largest city and main cultural and commercial centre. Other major urban areas include Lyon, Toulouse, Bordeaux and Nice. During the Iron Age, what is now metropolitan France was inhabited by a Celtic people. Rome annexed the area in 51 BC, holding it until the arrival of Germanic Franks in 476, who formed the Kingdom of Francia.
The Treaty of Verdun of 843 partitioned Francia into Middle Francia and West Francia. West Francia which became the Kingdom of France in 987 emerged as a major European power in the Late Middle Ages following its victory in the Hundred Years' War. During the Renaissance, French culture flourished and a global colonial empire was established, which by the 20th century would become the second largest in the world; the 16th century was dominated by religious civil wars between Protestants. France became Europe's dominant cultural and military power in the 17th century under Louis XIV. In the late 18th century, the French Revolution overthrew the absolute monarchy, established one of modern history's earliest republics, saw the drafting of the Declaration of the Rights of Man and of the Citizen, which expresses the nation's ideals to this day. In the 19th century, Napoleon established the First French Empire, his subsequent Napoleonic Wars shaped the course of continental Europe. Following the collapse of the Empire, France endured a tumultuous succession of governments culminating with the establishment of the French Third Republic in 1870.
France was a major participant in World War I, from which it emerged victorious, was one of the Allies in World War II, but came under occupation by the Axis powers in 1940. Following liberation in 1944, a Fourth Republic was established and dissolved in the course of the Algerian War; the Fifth Republic, led by Charles de Gaulle, remains today. Algeria and nearly all the other colonies became independent in the 1960s and retained close economic and military connections with France. France has long been a global centre of art and philosophy, it hosts the world's fourth-largest number of UNESCO World Heritage Sites and is the leading tourist destination, receiving around 83 million foreign visitors annually. France is a developed country with the world's sixth-largest economy by nominal GDP, tenth-largest by purchasing power parity. In terms of aggregate household wealth, it ranks fourth in the world. France performs well in international rankings of education, health care, life expectancy, human development.
France is considered a great power in global affairs, being one of the five permanent members of the United Nations Security Council with the power to veto and an official nuclear-weapon state. It is a leading member state of the European Union and the Eurozone, a member of the Group of 7, North Atlantic Treaty Organization, Organisation for Economic Co-operation and Development, the World Trade Organization, La Francophonie. Applied to the whole Frankish Empire, the name "France" comes from the Latin "Francia", or "country of the Franks". Modern France is still named today "Francia" in Italian and Spanish, "Frankreich" in German and "Frankrijk" in Dutch, all of which have more or less the same historical meaning. There are various theories as to the origin of the name Frank. Following the precedents of Edward Gibbon and Jacob Grimm, the name of the Franks has been linked with the word frank in English, it has been suggested that the meaning of "free" was adopted because, after the conquest of Gaul, only Franks were free of taxation.
Another theory is that it is derived from the Proto-Germanic word frankon, which translates as javelin or lance as the throwing axe of the Franks was known as a francisca. However, it has been determined that these weapons were named because of their use by the Franks, not the other way around; the oldest traces of human life in what is now France date from 1.8 million years ago. Over the ensuing millennia, Humans were confronted by a harsh and variable climate, marked by several glacial eras. Early hominids led a nomadic hunter-gatherer life. France has a large number of decorated caves from the upper Palaeolithic era, including one of the most famous and best preserved, Lascaux. At the end of the last glacial period, the climate became milder. After strong demographic and agricultural development between the 4th and 3rd millennia, metallurgy appeared at the end of the 3rd millennium working gold and bronze, iron. France has numerous megalithic sites from the Neolithic period, including the exceptiona
United States Department of State
The United States Department of State referred to as the State Department, is the federal executive department that advises the President and conducts international relations. Equivalent to the foreign ministry of other countries, it was established in 1789 as the nation's first executive department; the current Secretary of State is Mike Pompeo, who ascended to the office in April 2018 after Rex Tillerson resigned. The State Department's duties include implementing the foreign policy of the United States, operating the nation's diplomatic missions abroad, negotiating treaties and agreements with foreign entities, representing the United States at the United Nations, it is led by the Secretary of State, a member of the Cabinet, nominated by the President and confirmed by the Senate. In addition to administering the department, the Secretary of State serves as the nation's chief diplomat and representative abroad; the Secretary of State is the first Cabinet official in the order of precedence and in the presidential line of succession, after the Vice President of the United States, Speaker of the House of Representatives, President pro tempore of the Senate.
The State Department is headquartered in the Harry S Truman Building, a few blocks away from the White House, in the Foggy Bottom neighborhood of Washington, D. C.. The U. S. Constitution, drafted in Philadelphia in September 1787 and ratified by the 13 states the following year, gave the President the responsibility for the conduct of the nation's foreign relations; the House of Representatives and Senate approved legislation to establish a Department of Foreign Affairs on July 21, 1789, President Washington signed it into law on July 27, making the Department of Foreign Affairs the first federal agency to be created under the new Constitution. This legislation remains the basic law of the Department of State. In September 1789, additional legislation changed the name of the agency to the Department of State and assigned to it a variety of domestic duties; these responsibilities grew to include management of the United States Mint, keeper of the Great Seal of the United States, the taking of the census.
President George Washington signed the new legislation on September 15. Most of these domestic duties of the Department of State were turned over to various new federal departments and agencies that were established during the 19th century. However, the Secretary of State still retains a few domestic responsibilities, such as being the keeper of the Great Seal and being the officer to whom a President or Vice President of the United States wishing to resign must deliver an instrument in writing declaring the decision to resign. On September 29, 1789, President Washington appointed Thomas Jefferson of Virginia Minister to France, to be the first United States Secretary of State. John Jay had been serving in as Secretary of Foreign Affairs as a holdover from the Confederation since before Washington had taken office and would continue in that capacity until Jefferson returned from Europe many months later. From 1790 to 1800, the State Department had its headquarters in Philadelphia, the capital of the United States at the time.
It occupied a building at Fifth Streets. In 1800, it moved from Philadelphia to Washington, D. C. where it first occupied the Treasury Building and the Seven Buildings at 19th Street and Pennsylvania Avenue. It moved into the Six Buildings in September 1800, where it remained until May 1801, it moved into the War Office Building due west of the White House in May 1801. It occupied the Treasury Building from September 1819 to November 1866, except for the period from September 1814 to April 1816, it occupied the Washington City Orphan Home from November 1866 to July 1875. It moved to the State and Navy Building in 1875. Since May 1947, it has occupied the Harry S. Truman Building in the Foggy Bottom neighborhood of Washington. Condoleezza Rice became the second female secretary of state in 2005. Hillary Clinton became the third female secretary of state when she was appointed in 2009. In 2014, the State Department began expanding into the Navy Hill Complex across 23rd Street NW from the Truman Building.
A joint venture consisting of the architectural firms of Goody and the Louis Berger Group won a $2.5 million contract in January 2014 to begin planning the renovation of the buildings on the 11.8 acres Navy Hill campus, which housed the World War II headquarters of the Office of Strategic Services and was the first headquarters of the Central Intelligence Agency. The Executive Branch and the U. S. Congress have constitutional responsibilities for U. S. foreign policy. Within the Executive Branch, the Department of State is the lead U. S. foreign affairs agency, its head, the Secretary of State, is the President's principal foreign policy advisor. The Department advances U. S. objectives and interests in the world through its primary role in developing and implementing the President's foreign policy. It provides an array of important services to U. S. citizens and to foreigners seeking to visit or immigrate to the United States. All foreign affairs activities—U. S. Representation abroad, foreign assistance programs, countering internatio
An ethnic group or an ethnicity, is a category of people who identify with each other based on similarities such as common ancestry, history, culture or nation. Ethnicity is an inherited status based on the society in which one lives. Membership of an ethnic group tends to be defined by a shared cultural heritage, origin myth, homeland, language or dialect, symbolic systems such as religion and ritual, dressing style, art or physical appearance. Ethnic groups, derived from the same historical founder population continue to speak related languages and share a similar gene pool. By way of language shift, acculturation and religious conversion, it is sometimes possible for individuals or groups to leave one ethnic group and become part of another. Ethnicity is used synonymously with terms such as nation or people. In English, it can have the connotation of something exotic related to cultures of more recent immigrants, who arrived after the dominant population of an area was established; the largest ethnic groups in modern times comprise hundreds of millions of individuals, while the smallest are limited to a few dozen individuals.
Larger ethnic groups may be subdivided into smaller sub-groups known variously as tribes or clans, which over time may become separate ethnic groups themselves due to endogamy or physical isolation from the parent group. Conversely separate ethnicities can merge to form a pan-ethnicity and may merge into one single ethnicity. Whether through division or amalgamation, the formation of a separate ethnic identity is referred to as ethnogenesis; the term ethnic is derived from the Greek word ἔθνος ethnos. The inherited English language term for this concept is folk, used alongside the latinate people since the late Middle English period. In Early Modern English and until the mid-19th century, ethnic was used to mean heathen or pagan, as the Septuagint used ta ethne to translate the Hebrew goyim "the nations, non-Hebrews, non-Jews"; the Greek term in early antiquity could refer to any large group, a host of men, a band of comrades as well as a swarm or flock of animals. In Classical Greek, the term took on a meaning comparable to the concept now expressed by "ethnic group" translated as "nation, people".
In the 19th century, the term came to be used in the sense of "peculiar to a race, people or nation", in a return to the original Greek meaning. The sense of "different cultural groups", in American English "racial, cultural or national minority group" arises in the 1930s to 1940s, serving as a replacement of the term race which had earlier taken this sense but was now becoming deprecated due to its association with ideological racism; the abstract ethnicity had been used for "paganism" in the 18th century, but now came to express the meaning of an "ethnic character". The term ethnic group was first recorded in 1935 and entered the Oxford English Dictionary in 1972. Depending on the context, used, the term nationality may either be used synonymously with ethnicity, or synonymously with citizenship; the process that results in the emergence of an ethnicity is called ethnogenesis, a term in use in ethnological literature since about 1950. Depending on which source of group identity is emphasized to define membership, the following types of groups can be identified: Ethno-linguistic, emphasizing shared language, dialect – example: French Canadians Ethno-national, emphasizing a shared polity or sense of national identity – example: Armenians Ethno-racial, emphasizing shared physical appearance based on genetic origins – example: African Americans Ethno-regional, emphasizing a distinct local sense of belonging stemming from relative geographic isolation – example: South Islanders Ethno-religious, emphasizing shared affiliation with a particular religion, denomination or sect – example: JewsIn many cases – for instance, the sense of Jewish peoplehood – more than one aspect determines membership.
Ethnography begins in classical antiquity. The Greeks at this time did not describe foreign nations but had developed a concept of their own "ethnicity", which they grouped under the name of Hellenes. Herodotus gave a famous account of what defined Greek ethnic identity in his day, enumerating shared descent, shared language shared sanctuaries and sacrifices shared customs. Whether ethnicity qualifies as a cultural universal is to some extent dependent on the exact definition used. According to "Challenges of Measuring an Ethnic World: Science and reality", in Challenges of Measuring an Ethnic World: Science and Reality: Proceedings of the Joint Canada-United States Conference on the Measurement of Ethni
Portugal the Portuguese Republic, is a country located on the Iberian Peninsula in southwestern Europe. It is the westernmost sovereign state of mainland Europe, being bordered to the west and south by the Atlantic Ocean and to the north and east by Spain, its territory includes the Atlantic archipelagos of the Azores and Madeira, both autonomous regions with their own regional governments. Portugal is the oldest state on the Iberian Peninsula and one of the oldest in Europe, its territory having been continuously settled and fought over since prehistoric times; the pre-Celtic people, Celts and Romans were followed by the invasions of the Visigoths and Suebi Germanic peoples. Portugal as a country was established during the Christian Reconquista against the Moors who had invaded the Iberian Peninsula in 711 AD. Founded in 868, the County of Portugal gained prominence after the Battle of São Mamede in 1128; the Kingdom of Portugal was proclaimed following the Battle of Ourique in 1139, independence from León was recognised by the Treaty of Zamora in 1143.
In the 15th and 16th centuries, Portugal established the first global empire, becoming one of the world's major economic and military powers. During this period, today referred to as the Age of Discovery, Portuguese explorers pioneered maritime exploration, notably under royal patronage of Prince Henry the Navigator and King John II, with such notable voyages as Bartolomeu Dias' sailing beyond the Cape of Good Hope, Vasco da Gama's discovery of the sea route to India and the European discovery of Brazil. During this time Portugal monopolized the spice trade, divided the world into hemispheres of dominion with Castille, the empire expanded with military campaigns in Asia. However, events such as the 1755 Lisbon earthquake, the country's occupation during the Napoleonic Wars, the independence of Brazil, a late industrialization compared to other European powers, erased to a great extent Portugal's prior opulence. After the 1910 revolution deposed the monarchy, the democratic but unstable Portuguese First Republic was established being superseded by the Estado Novo right-wing authoritarian regime.
Democracy was restored after the Carnation Revolution in 1974. Shortly after, independence was granted to all its overseas territories; the handover of Macau to China in 1999 marked the end of what can be considered the longest-lived colonial empire. Portugal has left a profound cultural and architectural influence across the globe, a legacy of around 250 million Portuguese speakers, many Portuguese-based creoles, it is a developed country with a high-income advanced economy and high living standards. Additionally, it is placed in rankings of moral freedom, democracy, press freedom, social progress, LGBT rights. A member of the United Nations and the European Union, Portugal was one of the founding members of NATO, the eurozone, the OECD, the Community of Portuguese Language Countries; the word Portugal derives from the Roman-Celtic place name Portus Cale. Portus, the Latin word for port or harbour, Cala or Cailleach was the name of a Celtic goddess – in Scotland she is known as Beira – and the name of an early settlement located at the mouth of the Douro River which flows into the Atlantic Ocean in the north of what is now Portugal.
At the time the land of a specific people was named after its deity. Those names are the origins of the - gal in Galicia. Incidentally, the meaning of Cale or Calle is a derivation of the Celtic word for port which would confirm old links to pre-Roman, Celtic languages which compare to today's Irish caladh or Scottish cala, both meaning port; some French scholars believe it may have come from ` Portus Gallus', the port of the Celts. Around 200 BC, the Romans took the Iberian Peninsula from the Carthaginians during the Second Punic War, in the process conquered Cale and renamed it Portus Cale incorporating it to the province of Gaellicia with capital in Bracara Augusta. During the Middle Ages, the region around Portus Cale became known by the Suebi and Visigoths as Portucale; the name Portucale evolved into Portugale during the 7th and 8th centuries, by the 9th century, that term was used extensively to refer to the region between the rivers Douro and Minho. By the 11th and 12th centuries, Portugallia or Portvgalliae was referred to as Portugal.
The early history of Portugal is shared with the rest of the Iberian Peninsula located in South Western Europe. The name of Portugal derives from the joined Romano-Celtic name Portus Cale; the region was settled by Pre-Celts and Celts, giving origin to peoples like the Gallaeci, Lusitanians and Cynetes, visited by Phoenicians, Ancient Greeks and Carthaginians, incorporated in the Roman Republic dominions as Lusitania and part of Gallaecia, after 45 BC until 298 AD. The region of present-day Portugal was inhabited by Neanderthals and by Homo sapiens, who roamed the border-less region of the northern Iberian peninsula; these were subsistence societies that, although they did not establish prosperous settlements, did form organized societies. Neolithic Portugal experimented with domestication of herding animals, the raising of some cereal crops and fluvial or marine fishing, it is believed by some scholars that early in the first millennium BC, several waves of Celts invaded Portugal from Central Europe and inter-married with the local populations, forming differe
Population density is a measurement of population per unit area or unit volume. It is applied to living organisms, most of the time to humans, it is a key geographical term. In simple terms population density refers to the number of people living in an area per kilometer square. Population density is population divided by total land water volume, as appropriate. Low densities may lead to further reduced fertility; this is called the Allee effect after the scientist. Examples of the causes in low population densities include: Increased problems with locating sexual mates Increased inbreeding For humans, population density is the number of people per unit of area quoted per square kilometer or square mile; this may be calculated for a county, country, another territory or the entire world. The world's population is around 7,500,000,000 and Earth's total area is 510,000,000 square kilometers. Therefore, the worldwide human population density is around 7,500,000,000 ÷ 510,000,000 = 14.7 per km2. If only the Earth's land area of 150,000,000 km2 is taken into account human population density is 50 per km2.
This includes all continental and island land area, including Antarctica. If Antarctica is excluded population density rises to over 55 people per km2. However, over half of the Earth's land mass consists of areas inhospitable to human habitation, such as deserts and high mountains, population tends to cluster around seaports and fresh-water sources. Thus, this number by itself does not give any helpful measurement of human population density. Several of the most densely populated territories in the world are city-states and dependencies; these territories have a small area and a high urbanization level, with an economically specialized city population drawing on rural resources outside the area, illustrating the difference between high population density and overpopulation The potential to maintain the agricultural aspects of deserts is limited as there is not enough precipitation to support a sustainable land. The population in these areas are low. Therefore, cities in the Middle East, such as Dubai, have been increasing in population and infrastructure growth at a fast pace.
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. Most of the most densely populated cities are in Southeast Asia, though Cairo and Lagos in Africa fall into this category. City population and area are, however dependent on the definition of "urban area" used: densities are invariably higher for the central city area than when suburban settlements and the intervening rural areas are included, as in the areas of agglomeration or metropolitan area, the latter sometimes including neighboring cities. For instance, Milwaukee has a greater population density when just the inner city is measured, the surrounding suburbs excluded. In comparison, based on a world population of seven billion, the world's inhabitants, as a loose crowd taking up ten square feet per person, would occupy a space a little larger than Delaware's land area; the Gaza Strip has a population density of 5,046 pop/km.
Although arithmetic density is the most common way of measuring population density, several other methods have been developed to provide a more accurate measure of population density over a specific area. Arithmetic density: The total number of people / area of land Physiological density: The total population / area of arable land Agricultural density: The total rural population / area of arable land Residential density: The number of people living in an urban area / area of residential land Urban density: The number of people inhabiting an urban area / total area of urban land Ecological optimum: The density of population that can be supported by the natural resources Demography Human geography Idealized population Optimum population Population genetics Population health Population momentum Population pyramid Rural transport problem Small population size Distance sampling List of population concern organizations List of countries by population density List of cities by population density List of city districts by population density List of English districts by population density List of European cities proper by population density List of United States cities by population density List of islands by population density List of U.
S. states by population density List of Australian suburbs by population density Selected Current and Historic City, Ward & Neighborhood Density Duncan Smith / UCL Centre for Advanced Spatial Analysis. "World Population Density". Exploratory map shows data from the Global Human Settlement Layer produced by the European Commission JRC and the CIESIN Columbia University