Population growth is the increase in the number of people in a population or dispersed group. Actual global human population growth amounts to around 83 million annually, or 1.1% per year. The global population has grown from 1 billion in 1800 to 8.1 billion in 2024. The UN projected population to keep growing, and estimates have put the total population at 8.6 billion by mid-2030, 9.8 billion by mid-2050 and 11.2 billion by 2100. However, some academics outside the UN have increasingly developed human population models that account for additional downward pressures on population growth; in such a scenario population would peak before 2100. Others have challenged many recent population projections as having underestimated population growth.
61-509: Medeglia is a village and a former municipality in the district of Bellinzona in the canton of Ticino in Switzerland . On 21 November 2010, the former municipalities of Medeglia, Bironico , Camignolo , Rivera and Sigirino merged in the new municipality of Monteceneri . Medeglia is first mentioned in 1195 as Medellia . It can be assumed that in the High Middle Ages , Medeglia
122-473: A Fachhochschule ). In Medeglia there are a total of 44 students (as of 2009). The Ticino education system provides up to three years of non-mandatory kindergarten and in Medeglia there are 12 children in kindergarten. The primary school program lasts for five years and includes both a standard school and a special school. In the municipality, 11 students attend the standard primary schools and students attend
183-508: A mortgage or a rent-to-own agreement). As of 2000, there were 144 private households in the municipality, and an average of 2.3 persons per household. In 2000 there were 211 single family homes (or 88.7% of the total) out of a total of 238 inhabited buildings. There were 26 two family buildings (10.9%) and 1 multi-family buildings (0.4%). There were also buildings in the municipality that were multipurpose buildings (used for both housing and commercial or another purpose). The vacancy rate for
244-471: A certain time in Switzerland are also allowed to participate in municipal politics. As at the cantonal and federal level, citizens enjoy political rights, including direct democratic ones, in their municipality. Municipalities are financed through direct taxes (such as income tax ), with rates varying more or less within a framework set by the canton (see Taxation in Switzerland ). As among the cantons, there
305-531: A few dozen people ( Kammersrohr , Bister ), and their territory between 0.32 km² ( Rivaz ) and 439 km² ( Scuol ). The beginnings of the modern municipality system date back to the Helvetic Republic . Under the Old Swiss Confederacy , citizenship was granted by each town and village to only residents. These citizens enjoyed access to community property and in some cases additional protection under
366-453: A part-time student). There are 3 vocational students who are attending school full-time and 4 who attend part-time. The professional program lasts three years and prepares a student for a job in engineering, nursing, computer science, business, tourism and similar fields. There are 1 students in the professional program. As of 2000, there were 2 students in Medeglia who came from another municipality, while 35 residents attended schools outside
427-451: A sufficiently small time interval: A positive growth rate indicates that the population is increasing, while a negative growth rate indicates that the population is decreasing. A growth ratio of zero indicates that there were the same number of individuals at the beginning and end of the period—a growth rate may be zero even when there are significant changes in the birth rates , death rates , immigration rates , and age distribution between
488-469: Is a separable differential equation, the population may be solved explicitly, producing a logistic function : where A = K − P 0 P 0 {\displaystyle A={\frac {K-P_{0}}{P_{0}}}} and P 0 {\displaystyle P_{0}} is the initial population at time 0. The world population growth rate peaked in 1963 at 2.2% per year and subsequently declined. In 2017,
549-449: Is a tax transfer among the municipalities to balance various levels of tax income. Switzerland has a relatively high number of small municipalities, with a population of 1,000 or less, especially in rural areas. Because of the increasing difficulty in providing professional government services and in finding volunteers for political offices in small municipalities, the cantons tend to encourage voluntary mergers of municipalities. This led to
610-452: Is in direct contrast with less developed contexts, where population growth is still happening. Globally, the rate of population growth has declined from a peak of 2.2% per year in 1963. Population growth alongside increased consumption is a driver of environmental concerns , such as biodiversity loss and climate change , due to overexploitation of natural resources for human development . International policy focused on mitigating
671-520: Is located in the Bellinzona district, in the upper Vedeggio valley. It consists of the village of Medeglia and multiple hamlets including Drossa. Until 1805, the village of Robasacco (now part of Cadenazzo ) belonged to Medeglia. The municipalities of Medeglia, Bironico , Camignolo , Rivera and Sigirino are seeking approval from the voters to merge on some time in the future into a new municipality which will be known as Monteceneri. The blazon of
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#1732931279135732-402: Is the rate at which the number of individuals in a population increases in a given time period, expressed as a fraction of the initial population. Specifically, population growth rate refers to the change in population over a unit time period, often expressed as a percentage of the number of individuals in the population at the beginning of that period. This can be written as the formula, valid for
793-432: Is used for agricultural purposes, while 4.96 km (1.92 sq mi) or 79.1% is forested. Of the rest of the land, 0.24 km (0.093 sq mi) or 3.8% is settled (buildings or roads), 0.01 km (2.5 acres) or 0.2% is either rivers or lakes and 0.14 km (35 acres) or 2.2% is unproductive land. Of the built up area, housing and buildings made up 2.7% and transportation infrastructure made up 1.1%. Out of
854-684: The Bürgergemeinde /bourgeoisie. During the Mediation era (1803–1814), and especially during the Restoration era (1814–1830), many of the gains toward uniform citizenship were lost. Many political municipalities were abolished and limits were placed on the exercise of political rights for everyone except the members of the Bürgergemeinde . In the Regeneration era (1830–1848), the liberal revolutions of
915-495: The Bürgergemeinde in the population was reduced as a result of increasing emigration to the cities. This led to the Bürgergemeinde losing its former importance to a large extent. However, the Bürgergemeinde has remained, and it includes all individuals who are citizens of the Bürgergemeinde , usually by having inherited the Bürgerrecht (citizenship), regardless of where they were born or where they may currently live. Instead of
976-506: The DRC are witnessing a similar growth in population. The following table gives some example countries or territories: Human population projections are attempts to extrapolate how human populations will change in the future. These projections are an important input to forecasts of the population's impact on this planet and humanity's future well-being. Models of population growth take trends in human development and apply projections into
1037-731: The PS (with 39 or 16.2%) and the SSI (with 25 or 10.4%). In the 2007 Consiglio di Stato election, there were blank ballots and 1 null ballots, which left 242 valid ballots in the election. The most popular party was the PPD which received 81 or 33.5% of the vote. The next three most popular parties were; the PLRT (with 73 or 30.2%), the PS (with 44 or 18.2%) and the SSI (with 23 or 9.5%). As of 2007, Medeglia had an unemployment rate of 2.8%. As of 2005, there were people employed in
1098-527: The Swiss Reformed Church . There are 22 individuals (or about 6.67% of the population) who belong to another church (not listed on the census), and 9 individuals (or about 2.73% of the population) did not answer the question. The entire Swiss population is generally well educated. In Medeglia about 71.7% of the population (between age 25–64) have completed either non-mandatory upper secondary education or additional higher education (either University or
1159-516: The global population to increase from 1.6 billion in 1900 to 7.7 billion by November 2019. Some of the reasons for the "Modern Rise of Population" were particularly investigated by the British health scientist Thomas McKeown (1912–1988). In his publications, McKeown challenged four theories about the population growth: Although the McKeown thesis has been heavily disputed, recent studies have confirmed
1220-511: The industrial revolution . The most significant increase in the world's population has been since the 1950s, mainly due to medical advancements and increases in agricultural productivity . Due to its dramatic impact on the human ability to grow food, the Haber process , named after one of its inventors, the German chemist Fritz Haber , served as the "detonator of the population explosion ", enabling
1281-632: The place of birth , Swiss legal documents, e.g. passports, contain the Bürgerort (place of citizenship, or place of origin ). The Bürgergemeinde also often holds and administers the common property in the village for the members of the community. Each canton determines the powers and responsibilities of its municipalities. These may include providing local government services such as education, medical and social services, public transportation, and tax collection. The degree of centralization varies from one canton to another. The federal constitution protects
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#17329312791351342-497: The population is declining , especially in Eastern Europe , mainly due to low fertility rates , high death rates and emigration . In Southern Africa , growth is slowing due to the high number of AIDS-related deaths. Some Western Europe countries might also experience population decline. Japan's population began decreasing in 2005. The United Nations Population Division projects world population to reach 11.2 billion by
1403-427: The primary economic sector and about businesses involved in this sector. 4 people are employed in the secondary sector and there are 3 businesses in this sector. 11 people are employed in the tertiary sector , with 4 businesses in this sector. There were 150 residents of the municipality who were employed in some capacity, of which females made up 34.7% of the workforce. In 2000, there were 4 workers who commuted into
1464-445: The voter turnout was 73.6%. In the 2007 Gran Consiglio election, there were a total of 296 registered voters in Medeglia, of which 243 or 82.1% voted. 1 blank ballots and 1 null ballots were cast, leaving 241 valid ballots in the election. The most popular party was the PLRT which received 74 or 30.7% of the vote. The next three most popular parties were; the PLRT (with 74 or 30.7%),
1525-419: The 19th century, many inhabitants emigrated with the majority going to Argentina and California. The mountain pastures of Medeglia were classified in 1996 as a wetland of national importance. In 2000, three quarters of the working population worked outside the municipality. Medeglia has an area, as of 1997, of 6.27 square kilometers (2.42 sq mi). Of this area, 0.48 km (0.19 sq mi) or 7.7%
1586-652: The Swiss national languages (as of 2000), 16 speak German , 8 people speak French , 295 people speak Italian . The remainder (11 people) speak another language. As of 2008, the gender distribution of the population was 48.4% male and 51.6% female. The population was made up of 156 Swiss men (44.4% of the population), and 14 (4.0%) non-Swiss men. There were 173 Swiss women (49.3%), and 8 (2.3%) non-Swiss women. In 2008 there were 4 live births to Swiss citizens and births to non-Swiss citizens, and in same time span there were 7 deaths of Swiss citizens. Ignoring immigration and emigration,
1647-454: The UN projected that the world population, 8 billion as of 2023 , would peak around the year 2086 at about 10.4 billion, and then start a slow decline, assuming a continuing decrease in the global average fertility rate from 2.5 births per woman during the 2015–2020 period to 1.8 by the year 2100 (the medium-variant projection). The UN’s 2024 report has revised the peak population to 10.3 billion in
1708-474: The administration and profit from the property were totally held by the Bürgergemeinden , leaving the political municipality dependent on the Bürgergemeinde for money and use of the property. It was not until the political municipality acquired rights over property that served the public (such as schools, fire stations, etc.) and taxes, that they obtained full independence. For example, in the city of Bern, it
1769-403: The autonomy of municipalities within the framework set out by cantonal law. Municipalities are generally governed by an executive council headed by a president or mayor . Legislative authority is exercised by a town meeting of all citizens, or by a municipal parliament, depending on the size of the municipality, and on cantonal and municipal law. In some cantons, foreigners who have lived for
1830-422: The average number of residents per living room was 0.58 which is about equal to the cantonal average of 0.6 per room. In this case, a room is defined as space of a housing unit of at least 4 m (43 sq ft) as normal bedrooms, dining rooms, living rooms, kitchens and habitable cellars and attics. About 69% of the total households were owner occupied, or in other words did not pay rent (though they may have
1891-501: The common people helped to restore some rights again in a few cantons. In other cantons, the Bürgergemeinden were able to maintain power as political communities. In the city of Zürich it was not until the Municipal Act of 1866 that the political municipality came back into existence. The relationship between the political municipality and the Bürgergemeinde was often dominated by the latter's ownership of community property. Often
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1952-585: The construction rate of new housing units was 0 new units per 1000 residents. The historical population is given in the following chart: In the 2007 federal election the most popular party was the CVP which received 36.13% of the vote. The next three most popular parties were the FDP (33.01%), the SP (16.1%) and the SVP (7.99%). In the federal election, a total of 218 votes were cast, and
2013-476: The end of the Black Death , around the year 1350. A mix of technological advancement that improved agricultural productivity and sanitation and medical advancement that reduced mortality increased population growth. In some geographies, this has slowed through the process called the demographic transition , where many nations with high standards of living have seen a significant slowing of population growth. This
2074-522: The end of the 21st century. The Institute for Health Metrics and Evaluation projects that the global population will peak in 2064 at 9.73 billion and decline to 8.89 billion in 2100. A 2014 study in Science concludes that the global population will reach 11 billion by 2100, with a 70% chance of continued growth into the 22nd century. The German Foundation for World Population reported in December 2019 that
2135-415: The end of the upper secondary program, a student will be prepared to enter a trade or to continue on to a university or college. In Ticino, vocational students may either attend school while working on their internship or apprenticeship (which takes three or four years) or may attend school followed by an internship or apprenticeship (which takes one year as a full-time student or one and a half to two years as
2196-477: The estimated annual growth rate was 1.1%. The CIA World Factbook gives the world annual birthrate, mortality rate, and growth rate as 1.86%, 0.78%, and 1.08% respectively. The last 100 years have seen a massive fourfold increase in the population, due to medical advances , lower mortality rates, and an increase in agricultural productivity made possible by the Green Revolution . The annual increase in
2257-407: The forested land, 71.0% of the total land area is heavily forested and 5.7% is covered with orchards or small clusters of trees. Of the agricultural land, 3.8% is used for growing crops, while 1.1% is used for orchards or vine crops and 2.7% is used for alpine pastures. All the water in the municipality is flowing water. Of the unproductive areas, 1.9% is unproductive vegetation and . The municipality
2318-607: The future. These models use trend-based-assumptions about how populations will respond to economic, social and technological forces to understand how they will affect fertility and mortality , and thus population growth. The 2022 projections from the United Nations Population Division (chart #1) show that annual world population growth peaked at 2.3% per year in 1963, has since dropped to 0.9% in 2023, equivalent to about 74 million people each year, and could drop even further to minus 0.1% by 2100. Based on this,
2379-561: The global human population grows by 2.6 people every second, and could reach 8 billion by 2023. According to United Nations population statistics, the world population grew by 30%, or 1.6 billion humans, between 1990 and 2010. In number of people the increase was highest in India (350 million) and China (196 million). Population growth rate was among highest in the United Arab Emirates (315%) and Qatar (271%). Many of
2440-531: The impact of human population growth is concentrated in the Sustainable Development Goals which seeks to improve the standard of living globally while reducing the impact of society on the environment while advancing human well-being. World population has been rising continuously since the end of the Black Death , around the year 1350. Population began growing rapidly in the Western world during
2501-460: The law. Additionally, the urban towns and the rural villages had differing rights and laws. The creation of a uniform Swiss citizenship, which applied equally for citizens of the old towns and their tenants and servants, led to conflict. The wealthier villagers and urban citizens held rights to forests, common land and other municipal property which they did not want to share with the "new citizens", who were generally poor. The compromise solution, which
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2562-482: The municipal coat of arms is Azure a Sun in her Splendour Or between two Roses Argent slipped growing from a Mount of 3 Coupeaux of the second. Medeglia has a population (as of 2004) of 355. As of 2008, 5.7% of the population are foreign nationals. Over the last 10 years (1997-2007) the population has changed at a rate of -2%. Most of the population (as of 2000) speaks Italian (89.4%), with German being second most common ( 4.8%) and French being third ( 2.4%). Of
2623-462: The municipalities under cantonal or federal law. Municipalities are numbered by the Swiss Federal Office for Statistics (see Community Identification Number#Switzerland ). One or more postal codes (PLZ/NPA) can by assigned to a municipality or shared with other municipalities. Between 2011 and 2021 nine of the smallest municipalities merged into others as part of the effort to eliminate
2684-410: The municipality and 116 workers who commuted away. The municipality is a net exporter of workers, with about 29.0 workers leaving the municipality for every one entering. Of the working population, 7.3% used public transportation to get to work, and 79.3% used a private car. As of 2009, there were 0 hotels in Medeglia. From the 2000 census, 289 or 87.6% were Roman Catholic , while 10 or 3.0% belonged to
2745-411: The municipality, in 2008, was 0%. In 2000 there were 264 apartments in the municipality. The most common apartment size was the 3 room apartment of which there were 76. There were 23 single room apartments and 51 apartments with five or more rooms. Of these apartments, a total of 142 apartments (53.8% of the total) were permanently occupied, while 122 apartments (46.2%) were seasonally occupied. As of 2007,
2806-748: The municipality. Municipalities of Switzerland Municipalities ( German : Gemeinden , Einwohnergemeinden or politische Gemeinden ; French : communes ; Italian : comuni ; Romansh : vischnancas ) are the lowest level of administrative division in Switzerland. Each municipality is part of one of the Swiss cantons , which form the Swiss Confederation . In most cantons, municipalities are also part of districts or other sub-cantonal administrative divisions. There are 2,131 municipalities as of January 2024 . Their populations range between several hundred thousand ( Zürich ), and
2867-671: The number of living humans peaked at 88.0 million in 1989, then slowly declined to 73.9 million in 2003, after which it rose again to 75.2 million in 2006. In 2017, the human population increased by 83 million. Generally, developed nations have seen a decline in their growth rates in recent decades, though annual growth rates remain above 2% in some countries of the Middle East and Sub-Saharan Africa , and also in South Asia , Southeast Asia , and Latin America . In some countries
2928-436: The number of municipalities dropping by 384 between the end of 2010 and the beginning of 2019. Some municipalities designate themselves as "city" ( ville or Stadt ) or as "village" ( Dorf ). These designations result from tradition or local preference – for example, several small municipalities designated as cities held city rights in medieval times – and normally do not impact the legal or political rights or obligations of
2989-523: The population are between 0 and 9 years old and 23 teenagers or 6.6% are between 10 and 19. Of the adult population, 29 people or 8.3% of the population are between 20 and 29 years old. 48 people or 13.7% are between 30 and 39, 69 people or 19.7% are between 40 and 49, and 49 people or 14.0% are between 50 and 59. The senior population distribution is 47 people or 13.4% of the population are between 60 and 69 years old, 27 people or 7.7% are between 70 and 79, there are 25 people or 7.1% who are over 80. As of 2000
3050-439: The population has reached its carrying capacity , it will stabilize and the exponential curve will level off towards the carrying capacity, which is usually when a population has depleted most its natural resources . In the world human population, growth may be said to have been following a linear trend throughout the last few decades. The growth of a population can often be modelled by the logistic equation where As it
3111-465: The population of Swiss citizens decreased by 3 while the foreign population remained the same. At the same time, there was 1 non-Swiss man who immigrated from another country to Switzerland. The total Swiss population change in 2008 (from all sources) was an increase of 6 and the non-Swiss population change was an increase of 3 people. This represents a population growth rate of 2.6%. The age distribution, as of 2009, in Medeglia is; 34 children or 9.7% of
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#17329312791353172-434: The smallest communities. Only Bister has not merged into a new municipality although the smallest municipality is now Kammersrohr with a population of just 32. In addition to the municipalities as basic territorial political subdivisions, a number of other local subdivisions exist in several cantons. These include: Population growth#Population growth rate The world human population has been growing since
3233-417: The special school. In the lower secondary school system, students either attend a two-year middle school followed by a two-year pre-apprenticeship or they attend a four-year program to prepare for higher education. There are 9 students in the two-year middle school and in their pre-apprenticeship, while 4 students are in the four-year advanced program. The upper secondary school includes several options, but at
3294-411: The two times. A related measure is the net reproduction rate . In the absence of migration, a net reproduction rate of more than 1 indicates that the population of females is increasing, while a net reproduction rate less than one ( sub-replacement fertility ) indicates that the population of females is decreasing. Most populations do not grow exponentially, rather they follow a logistic model . Once
3355-406: The value of his ideas. His work is pivotal for present day thinking about population growth, birth control, public health and medical care. McKeown had a major influence on many population researchers, such as health economists and Nobel prize winners Robert W. Fogel (1993) and Angus Deaton (2015). The latter considered McKeown as "the founder of social medicine ". The "population growth rate"
3416-680: The world's countries, including many in Sub-Saharan Africa , the Middle East , South Asia and South East Asia , have seen a sharp rise in population since the end of the Cold War . The fear is that high population numbers are putting further strain on natural resources, food supplies, fuel supplies, employment, housing, etc. in some of the less fortunate countries. For example, the population of Chad has ultimately grown from 6,279,921 in 1993 to 10,329,208 in 2009, further straining its resources. Vietnam , Mexico , Nigeria , Egypt , Ethiopia , and
3477-572: The year 2084. However, estimates outside of the United Nations have put forward alternative models based on additional downward pressure on fertility (such as successful implementation of education and family planning goals in the UN's Sustainable Development Goals ) which could result in peak population during the 2060–2070 period rather than later. Even though the global fertility rate continues to fall, chart #2 shows that because of population momentum
3538-445: Was first mentioned in 1328. The romanesque core of the church was renovated and rebuilt in the 15th and 17th centuries. The local economy of the village was based on animal husbandry and forestry. Starting in the 16th century the residents of Isone and Medeglia bought forests and pastures as far away as Robasacco, Contone , Cadenazzo , Sant'Antonino and Camorino while at the same time opening up trade relations with Bellinzona. In
3599-480: Was not until after the property division of 1852 that the political municipality had the right to levy taxes. It was not until the Federal Constitution of 1874 that all Swiss citizens were granted equal political rights on local and Federal levels. This revised constitution finally removed all the political voting and electoral body rights from the Bürgergemeinde . In the cities, the percentage of members in
3660-450: Was part of the old valley community of Carvina. In 1501-03 changed area around Isone , Medeglia and Lugano became part of the county of Bellinzona , but remained in the Agno parish . It became part of the parish of Bironico in the 13th century. Then, in 1585, it broke away from that parish to become a vice parish. It was raised to a full parish in 1888. The parish church of St. Bartholomew
3721-481: Was written into the municipal laws of the Helvetic Republic, is still valid today. Two politically separate but often geographically similar organizations were created. The first, the so-called municipality, was a political community formed by election and its voting body consists of all resident citizens. However, the community land and property remained with the former local citizens who were gathered together into
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