World population, the total population of the world (Earth) at a given point in time. As of January 4, 2013, there were 7.057 billion people in the world, according to estimates from the U.S. Census Bureau. Data from the U.S. Census Bureau indicates that the global population surpassed 7 billion on March 12, 2012; while the United Nations Population Fund indicates that the global population reached 7 billion on October 31, 2011, and 7.1 billion in 2014.In 2016, the world's population reached 7,262,306,342 (7,262,310,000,000) people.
The world's population has been growing since the period of the Black Death and the European Famine in the 1450s, when the world had about 370 million people. Subsequent growth was sporadic due to wars and other factors. After the end of the Second World War, from the 1950s onwards, the rate of world population growth accelerated markedly - by more than 1.8% per year - as a result of a reduction in the factors that had led to a slowdown in population growth, such as war and famine. This state of affairs continued until 1970. world population grew by 2.2% in 1963, reaching an all-time peak. Subsequently, as the economy developed and people's views on fertility changed, the rate of population growth declined. 2011 saw the world's population grow by about 1.1%. The world population is expected to reach 8 billion by 2040.
Current projections suggest that the world's population will continue to grow in the coming decades, but because of factors such as declining birth rates, which are more difficult to estimate, it is not possible to arrive at a specific value, other than to say that the world's population in 2050 will be about 7.5 billion to 10.5 billion, depending on how fast the birth rate declines. In the longer term, it is estimated that the world population will stop growing and decline slowly from about 2050 to 2150. At the same time, some analyses have expressed concern about whether population growth will be sustainable.
Chinese name
World population
Foreign name
world population
Explanation
The sum total of the world's population at a given point in time
Number of people in the world
7,727,230,000,000 (August 2019)
Attributes
Glossary
Quick
Navigation
Population 7 billion
Living in slums
Specific data
Population history
Sparse areas
Top ten cities
Population hundreds of millions of people countries
Population density
Distributional characteristics
Development Issues
Future Population
Population Explosion
Growth Scenario
Population issues are attracting more and more attention from the international community. Since 1954, the United Nations has convened several world population conferences. the Third International Conference on Population and Development, held in Cairo from September 5 to 13, 1994, was attended by more than 15,000 delegates from 182 countries and regions. For the first time, the Conference linked population issues with sustainable development. The Conference concluded with the adoption of the Programme of Action, which called on all countries to strengthen cooperation in the field of population and development and to solve the ****same problems faced by mankind.The United Nations convened a special session on population and development from June 30 to July 2, 1999, which once again recognized the importance of solving the population problem from the strategic level of population and economic, social, resource, environmental and sustainable development.
World Population Density
According to the World Population Report issued by the United Nations Population Fund in London on July 11, 1995, the total world population in 1995 was 5.7 billion. Illiteracy stood at 960 million, of which two-thirds were women and one-third were children. It is presumed that the global annual increase in the number of people will remain at more than 86 million. By 2015 the world population will reach 7.1-7.8 billion, by 2025 it will exceed 8 billion, and by 2050 it will reach 9.4 billion. According to scientists' analysis, the world's population will peak at 10.6 billion by 2080 and will gradually decline thereafter to 10.35 billion by the end of the 21st century.
Population 7 billion
The world's population is expected to reach 7 billion on October 30, 2011, according to the UN Population Fund. The U.N. demographic method is said to be the "gold standard," but experts question the accuracy of its extrapolations. The UN Population Fund uses the "gold standard" to project that the 8 billionth person will appear in 2025 and the 10 billionth person will appear before 2100, and says that the error is no more than 1%. But analysts say the error could move the 7 billionth person up or down by as much as half a year, given the large base figure.
Many countries will be waiting in maternity wards for the "7 billionth baby" and are preparing to hold events to mark the occasion. However, U.N. Secretary-General Ban Ki-moon said he was not prepared to hold the "7 billion babies" because "he (she) was born in a paradoxical world," a world where "there is plenty of food, but one billion people go hungry every day. ". In his speech a few days ago, Ban Ki-moon said, "This is not a story of numbers, this is a story of human beings, 7 billion of them, meaning the need for more food, more energy, more opportunities for employment and education, more rights and more freedom for them to reproduce and nurture their offspring." Danica Camacho was born in a hospital in Manila, the capital of the Philippines, two minutes before zero hour on the 31st, surrounded by the media spotlight. She will be one of several babies around the globe to be declared the symbolic 7 billionth person in the world.
Senior U.N. officials traveled to the Philippines to receive the tiny baby and her parents and gave Danica a cupcake as a gift. In addition, the Camachos received various gifts from local donors, including a bursary fund for Danica and help with the family's grocery store expenses.
Philippine Health Secretary Ona said the birth of the world's 7 billionth person presents an opportunity for the Philippines to look at population issues. The Philippines is reportedly the 12th most populous country in the world as of 2014 with 100 million people. China and India still hold the top two spots.
Living in the slums
Back on Oct. 12, 1999, then-U.N. Secretary General Kofi Annan "designated" Bosnia and Herzegovina's baby Mavic as the world's 6 billionth person. The baby now lives in a Sarajevo slum.
U.N. statistics show that the world's population grew from 1 billion to 2 billion in more than a century, from 2 billion to 3 billion in 32 years, and since 1987, it has grown by 1 billion every 12 years.
The latest U.N. report, World Population Prospects: the 2015 Revision, projects that the world's population will reach 7.3 billion by 2030, 9.7 billion by 2050 and 11.2 billion by 2100. The fastest growth will be in developing regions, especially in Africa. India will become the most populous country in 2022, and Nigeria's population will surpass that of the United States in 2050. Population growth will decline in all countries of the world, and the proportion of old people will rise.
Wu Hongbo, UN Under-Secretary-General for Economic and Social Affairs, said understanding future demographic changes and the challenges and opportunities they present for achieving sustainable development is critical to the design and implementation of the new development agenda.
First, the world's population rankings are shuffling. The report shows that China and India remain the world's most populous countries, accounting for 19 percent and 18 percent of the world's total population, respectively. By 2022, India's population is expected to surpass China's. Currently, among the world's 10 most populous countries, Asia accounts for five seats, namely China, India, Indonesia, Pakistan and Bangladesh, while the remaining five countries are the United States, Nigeria, Mexico, Brazil and Russia. Among them, Nigeria has the seventh largest population and the fastest growing population at present, and is expected to overtake the United States by 2050 to become the third most populous country in the world. By 2050, more than 300 million people will reach six countries, the new additions are Indonesia, Nigeria, Pakistan. 2050 (China) people 1.38 billion or so, which was released in 2016 by the National Health Planning Commission. (India) population specifics are not known must be more than now.
The report shows that the world's population growth will be dominated by countries with higher fertility rates in Africa and some of the most populous countries. Between 2015 and 2050, half of the world's new population will come from nine countries, which, by increment, are India, Nigeria, Pakistan, the Democratic Republic of Congo*** and the State of, Ethiopia, Tanzania, the United States, Indonesia and Uganda.
Two, Africa became the fastest growing continent in terms of population. Due to high birth rates, Africa is expected to account for more than half of the world's new population between 2015 and 2050. Twenty-eight African countries will double their populations during this period. Ten African countries are expected to see their populations quintuple by 2100: Angola, Burundi, the Democratic Republic of Congo*** and the State of Malawi, Mali, Niger, Somalia, Uganda, Tanzania and Zambia.
Third, the world's population growth rate is declining. Because of the decline in the overall global birth rate, there has been a corresponding decline in the growth rate of the world's population. With little change in reproductive behavior, future population growth rates are based primarily on birth rates. Differences in birth rates can affect population distribution over decades. In recent years, birth rates have declined significantly around the world, even in Africa, where birth rates are high.
Fourth, there is a rapidly growing older population. As the rate of population growth declines due to declining birth rates, this leads to an increase in the proportion of older people. Globally, the population aged 60 years or older will double by 2050 and triple by 2100. Most regions of the world will face a marked increase in the proportion of older persons in the coming decades, with the proportion of persons aged 60 years or over in Europe increasing to 34 per cent by 2050. In Latin America, the Caribbean and Asia, the proportion of persons aged 60 years or over will increase from 11 to 12 per cent today to more than 25 per cent in 2050. Africa has the highest proportion of young people, but its population is ageing just as rapidly, with the proportion of people aged 60 years or over increasing from 5 percent today to 9 percent. [1]
Specific data
There are about 200 countries and territories in the world, of which 13 have a population of 100 million or more: China, India, the United States, Indonesia, Brazil, Pakistan, Russia, Nigeria, Bangladesh, Japan, Mexico, the Philippines and Ethiopia. These 13 countries have a total population of 4.35 billion, accounting for 63.11% of the world's total population.
Africa's population is growing too fast
Imbalanced distribution of the world's population Due to the differences in the natural environment and the level of economic development of the world's countries, the geographic distribution of the population is unbalanced. The spatial distribution of the world's population is categorized into densely populated areas, sparsely populated areas and unpopulated areas that are largely unexplored. According to statistics, the most densely populated areas of the earth account for about 7% of the land area, but 70% of the world's population lives there, and more than 90% of the world's population is concentrated in 10% of the land. The distribution of population among continents is also quite disparate. Eurasia and Europe account for about 32.2% of the Earth's total land area. However, the populations of the two continents account for 75.2% of the world's total population. Asia, in particular, is home to 60% of the world's population. Africa, North America and Latin America account for about half of the world's land area and the population is still less than 1/4 of the world's total population. oceania is even more sparsely populated. Antarctica has no permanent inhabitants. Europe and Asia are the most densely populated, with an average of more than 90 people per square kilometer, while Africa, Latin America and North America have an average of less than 20 people per square kilometer. Oceania is the least densely populated, with an average of only 2.5 people per square kilometer. World population according to latitude, height distribution there are obvious differences: the northern hemisphere of the mid-latitude zone is the world's population concentrated distribution area, nearly 80% of the world's population is distributed in the northern latitude 20 ° ~ 60 ° between the southern hemisphere population accounts for more than 11% of the world's population; the vertical distribution of the world's population is also unbalanced, more than 55% of the population live in the elevation of 200 meters above sea level below the level of less than 28% of the land area of the low flat area. The vertical distribution of the world's population is also unbalanced. As the tendency of productivity to concentrate in coastal areas continues to develop, the population also concentrates in coastal areas. On all continents, the proportion of the population living within 200 kilometers of the coast has significantly exceeded the proportion of its area, and the trend of population growth in the coastal zone will continue to develop.
The State of World Population Report 2010 predicts that by 2050, the world's population will exceed 9 billion, and the number of countries with populations of more than 100 million will increase to 17, with India replacing China as the world's most populous country. The report shows that by 2050 the world population will increase to 9.15 billion, an increase of 2.241 billion. Among them, the population of the African region will increase from 1.033 billion to 1.985 billion, the largest increase in the population of the Asian region will also have a relatively large increase in the population will increase from 4.167 billion to 5.232 billion; and the population of Europe will be reduced from 733 million to 691 million, it will be the only continent with a decrease in population. The report says that 11 countries in the world*** have populations of more than 100 million. China has the largest population of 1.354 billion, followed by India with 1.215 billion. The other countries with populations over 100 million are, in order, the United States, Indonesia, Brazil, Pakistan, Bangladesh, Nigeria, Russia, Japan and Mexico. The report predicts that by 2050, four African countries - Congo (DRC), Egypt, Ethiopia and Tanzania - as well as the Philippines and Vietnam in Asia will also have populations of over 100 million. By then, India's population will have increased to 1.614 billion, making it the world's most populous country; China's population will have increased to 1.417 billion, relegating it to second place. The world's total population is 6.909 billion, of which only 1.237 billion live in the more developed regions.
Population history
Ancient population
According to modern analysis, humans suffered a population bottleneck in about 70,000 BC. The cause may have been the effects of a mega-catastrophe caused by the eruption of a large volcano at Lake Toba in northern Sumatra, Indonesia. From that time on, the total world population stagnated at around one million for a long period of time, with everyone subsisting on hunter-gatherers, a method of survival that left the population in no condition to grow rapidly. This state of affairs lasted until 11,000 B.C., when people began to develop agriculture. Until then, the world's population never exceeded 15 million people.
When people began to develop agriculture on a large scale, world population growth accelerated. In 8000 B.C. there were five million people in the world; in 1 A.D. there were about 200 million; and by the fourth century A.D. there were more than 50 million people living in the Roman Empire alone.
However, the growth of the world's population fluctuated again because of plagues, wars, and other effects. In Europe, for example, the Great Plague of Justinian reduced the population of Europe in the eighth century by about half of what it was in 541 AD. Europe's population then grew again, to about 70 million by 1340, and the Black Death, which occurred mainly in Europe in the 14th century, reduced the world's population from about 450 million in 1340 to about 350 to 375 million in 1400. Europe then took about 200 years to recover to its 1340 population level. China, another populous country, also experienced huge fluctuations in population due to the change of dynasties. According to estimates, China had about 65 million people in 1393, down by about half from 123 million in 1200. This was mainly due to the long period of wars between the Song and Yuan dynasties. in 1368, when the Ming dynasty was established, China's population was about 60 million. By the time the Ming dynasty fell in 1644, the population had grown to about 150 million.
The population of Britain reached 5.6 million in 1650. This was up from 2.6 million in 1500. The wave of colonization that began in Europe in the sixteenth century also contributed to the growth of the world's population, as colonists tended to bring the more advanced crops (e.g., corn, sweet potatoes) from their colonies to other regions to promote them in order to increase food production.
The population of the Americas (including North and South America) in 1500 was about 50 to 100 million. North America before Columbus discovered the continent had about two to eighteen million people. However, the Europeans brought infectious diseases to North America that the natives had never encountered before, and because the natives had not yet built up immunity to these diseases, it is estimated that 90% of the North American natives at the time died from contracting infectious diseases.
Modern Population
With the unfolding of the Agricultural and Industrial Revolutions, people's standard of living improved, mortality rates declined, infant survival rates rose dramatically, and life expectancy increased. In Britain, for example, 74.5% of children died before the age of five in 1730-1749, and in 1810-1829 the figure fell to 31.8%.The population of Europe began to rise dramatically from 1700 onwards, and by 1900 it had reached 400 million, quadrupling the 1700 figure of 100 million. And Europe's population in 1900 was about 36 percent of the world's population.
In the 19th century, when compulsory pox planting was already underway in Western countries and health care equipment became widespread in those places, the rate of population growth in Western countries rose. The population of the United Kingdom doubled every 50 years; in 1801, there were 8.3 million people; in 1901, there were 30.5 million; and in 2006, there were more than 60 million. The population of the United States also grew from 5.3 million in 1800 to 106 million in 1920. In 2010, there were already more than 307 million people in the United States.
The population of the Soviet Union in the early and mid-twentieth century experienced major ups and downs. As a result of ongoing wars, by the end of World War II in 1945, the Soviet Union lost about 90 million people. Subsequently, the population of the Soviet Union grew steadily, but from the 1990s onwards, the population of Russia after the collapse of the Soviet Union stagnated again. there were 143 million people in Russia in 2012, down from 148 million in 1991, and if the demographic development situation remains unchanged, it will drop even more to 107 million by 2050.
Population growth in many developing countries has been very rapid since the Second World War, as the world entered a period of relative peace and continued improvement in science, technology and medical care. These countries are mainly from Asia, Africa and Latin America. In China, for example, there were about 430 million people in the Qing Dynasty in 1850 and 580 million at the beginning of the establishment of the People's Republic of China in 1953. Despite the wars, the population grew by 150 million in more than a hundred years. Since the 1950s, China's population has also grown rapidly, with the 1982 census showing a population of more than one billion; today, China has more than 1.3 billion people, a huge number that has forced the Chinese government to implement a family planning policy to slow down the growth of the population. India, the second most populous country in the world, had about 125 million people in 1750 and reached 389 million in 1941; today it has more than 1.2 billion people. The population of the Java region of Indonesia has risen from five million in 1815 to 130 million currently. Mexico's population grew from 13 million in 1900 to 112 million in 2009. The population of Kenya in Africa also grew from 2.9 million in 1920 to more than 37 million currently.
As the twenty-first century progressed, many developing countries coincidentally showed signs of slowing population growth as their economies and education levels improved. This is mainly reflected in the beginning of a decline in the birth rate, and by the aging trend and mortality rate increase. In some developed countries, such as Japan and Russia, the population has already begun to gradually decline.
Population milestones
The world is estimated to have surpassed one billion people around 1804. It then took about 123 years to pass 2 billion in 1927; followed by the 3 billion mark in 1960, a period of only 33 years; it took 14 years for the world population to pass 4 billion in 1974; 13 years to pass 5 billion in 1987; and 12 years to pass 6 billion in 1999; United Nations figures show that the world's population passed 7 billion in October 2011; and the U.S. Census Bureau, on the other hand, shows the world surpassed 7 billion people in 2012, taking about 13 years to reach the 1999 milestone.
Sparse areas
There are some countries in the world where, due to geographic constraints or relatively small populations but large land areas, the population is very sparsely distributed, even as few as 0.026 people per square kilometer.
Population aging
Greenland
Total population of about 56,900,000 people, an area of 2,175,600 square kilometers, an average of 0.026 people per square kilometer. Greenland is an ice-covered island between the Arctic Ocean and the Atlantic Ocean, located in northeastern Canada; it is by far the largest island in the world and a self-governing province of Denmark. Greenland is somewhat larger than the U.S. state of Alaska and comparable in size to Saudi Arabia, with 2.85 million cubic kilometers of ice resources and a total population of less than 57,000 people.
Falkland Islands/Malvinas Islands (British-Argentine dispute)
Total population of 3,060, with an area of 12,173 square kilometers, an average of 0.25 people per square kilometer.
Crowded station
The Falkland Islands are made up of two main islands and 776 small islands in the southern Atlantic Ocean, 480 kilometers off the coast of Argentina, and it is an overseas self-governing territory of the United Kingdom. It is the size of Connecticut or Northern Ireland in the United States, with a population of only 3,060, and 583,000 sheep are kept on the islands.
Western Sahara
The population totals 440,000, covering 266,000 square kilometers, with an average of 1.3 people per square kilometer. Western Sahara is located in northern Africa, neighboring Morocco in the north, Algeria in the northeast, Mauretania in the east and south, and the Atlantic Ocean in the west. Morocco and the Polisario Front (POLISARIO FRONT) have disputed territorial control of the area. It is the size of the U.S. state of Colorado or New Zealand, with a total population of 440,000, and the region has sandy soil and a massive lack of water.
Mongolia
The population totals 2,646,500 people and covers an area of 1,564,100 square kilometers, with an average of 1.7 people per square kilometer.
Crowded stations
Mongolia is a landlocked country in East Asia, located between China and Russia, it is the second most landlocked country in the world (after Kazakhstan), with an area equivalent to the Canadian province of Quebec or Iran, and a total population of 2.6 million.
Guyana
The total population is 187,000 with an area of 90,000 square kilometers and an average of 2.1 people per square kilometer. The region of French Guiana is located on the east coast of South America, neighboring Suriname to the west, Brazil to the southwest, and the Atlantic Ocean to the north. Like other overseas dependencies, French Guiana belongs to one of France's 26 regions, which is the size of the U.S. state of Maine or Portugal, with a total population of 187,000, and is home to one of the European Space Agency's space launch sites.
Namibia
The population totals 2,031,200 people and covers an area of 824,300 square kilometers, with an average of 2.5 people per square kilometer.
Namibia is located in southwestern Africa, bordering the Atlantic Ocean to the west, South Africa to the south, Botswana to the east, and Angola to the north. With an area equivalent to Pakistan and a total population of 2.03 million, the country is a heavily infected area for AIDS.
Australia
The total population of 21.05 million people, an area of 7,682,300 square kilometers, an average of 2.6 people per square kilometer.
Located in the Indian and Pacific Oceans, Australia is the size of 48 U.S. states and twice the territory of the European Union countries, with two-thirds of the population living in five major coastal cities.
Suriname
The population totals 449,200 and covers an area of 163,800 square kilometers, with an average of 2.7 people per square kilometer.
Suriname*** and the country is a country in the north of South America, with the country neighboring Guyana in the west, Brazil in the south, French Guiana in the east, and the Atlantic Ocean in the north. Its area is equivalent to the U.S. state of Wisconsin or Tunisia, with a population of nearly 450,000, and its inhabitants are multilingual compared to other countries of comparable size.
Iceland
The total population is 309,700, with an area of 103,000 square kilometers and an average of 3 people per square kilometer.
Iceland is an island country in northern Europe, located between the North Atlantic Ocean, mainland Europe and Greenland. It is the size of the American state of Kentucky or the former East Germany, and has a population of only 300,000, with a large proportion of elderly people.
Mauritania
The total population is 3,068,700, with an area of 1,025,500 square kilometers and an average of 3 people per square kilometer.
The Islamic **** and State of Mauretania is located in northwestern Africa, close to the Atlantic Ocean in the west, neighboring Senegal in the southwest, bordering Mali in the east and southeast, and Algeria in the northeast, and has an area equivalent to the Canadian province of Ontario, but a population of only 3 million people.
Top Ten Cities
Tokyo
Tokyo
Tokyo
3,530,000 people, built-up area of 6,993 square kilometers; Tokyo Metropolis, 12,820,000 inhabitants, area of 2,155 square kilometers; Tokyo Ward Department, 8,130,000 inhabitants, area of 650 square kilometers.
Mexico City
19.24 million people, built-up area of 2,072 square kilometers, 2005 GDP of $315 billion; district population of 8.23 million.
Mumbai
18.84 million people, built-up area of 500 square kilometers; district department population of 9.93 million.
Mexico City
New York
18.65 million people, built-up area of 8,000 square kilometers, 2005 GDP of $113.3 billion; district ministry population of 8 million, 945 square kilometers.
S?o Paulo
18.61 million people, 2,300 square kilometers of built-up area, 2005 GDP $225 billion; 10 million people in the district department, 1,624 square kilometers.
Seoul
17 million people, 1,049 square kilometers, 2005 GDP $218 billion (district only); district population 10.23 million, area 605 square kilometers.
S?o Paulo
New Delhi
Population 16 million, area 1,295 square kilometers, 2005 GDP $93 billion; district ministry population 7.2 million.
Kolkata
Population 14.57 million, area 531 sq km, 2005 GDP $94 billion; district ministry population 4.39 million.
Jakarta
Population 13.67 million, 1360 sq km, 2005 GDP $98 billion; district ministry population 9.37 million, area 650 sq km.
New Delhi
Shanghai
25 million people, 9.1 square kilometers, 2005 GDP $914.390 billion; Shanghai Municipal District has a population of 18.5 million and an area of 6,340 square kilometers; the District Department has an area of 6.1 square kilometers and a population of 8.21 million.
Countries with hundreds of millions of people
Units of population:
China: 1,400.05 million (2019)[2]
India: 1,324.0 million (2019)
United States: 330.0 million (2019)[3]
Indonesia: 262.0 million (2019)
Brazil: 208.6 million (2017)
Pakistan: 1.97 (2017)
Nigeria: 1.822 (2016)
Bangladesh: 1.6 (2016)
Russia: 1.441 (2016)
Japan: 1.27 ( 2016)
Mexico: 1.27 (2016)
Philippines: 1.007 (2016)
Ethiopia: 1.024 (2016)
(Data from United Nations Population Division)
Population density
The following areas include the area of inland waters (lakes, ponds, rivers). Statistical date July 2011
Rank continent (continent)/country/region Population Area (sq. km) Average (people/sq. km)
-
Worldwide (counting land only)
6,928,198,253
148,940,000
46.5
-
Asia
4,000,601,258
43,810,589
91.3
-
Europe
728,389. 000
10,180,000
71.6
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Distributional Characteristics
(1) Population growth is unevenly distributed in space and time: the time for the century's exponential population growth has been shortening; and the rate of growth varies considerably from continent to continent and from country to country.
(2), the world's population is concentrated in the northern and eastern hemispheres, in the middle and lower latitudes, and in coastal areas.
(3), world population structure: population aging rapidly. (Waves of gray hair)
(4), world population migration: large-scale population movements in recent times: migration from Europe to the Americas, Australia and New Zealand, from Africa to the Americas, and from Asian countries.
(5) Population problems: excessive population growth, excessive large population urbanization in urbanization development.
Development Problems
Earlier calculations by scientists concluded that the earth can support at most 10 to 15 billion inhabitants. If population growth is not effectively controlled in a timely manner, the ideal of sustainable human development is likely to be difficult to realize.
A study released by the United Nations in March 2005 said that the continuous growth of the world's population and the expansion of economic activities over the past 50 years have exerted enormous pressure on the Earth's ecosystem. Human activities have negatively impacted 60 percent of the planet's grasslands, forests, agricultural lands, rivers and lakes. In recent decades, one-fifth of the planet's corals and one-third of its mangroves have been destroyed, animal and plant diversity is rapidly decreasing, and one-third of all species are on the verge of extinction.
Population growth and other factors have combined to pose a serious challenge to human society as a whole. Taking water resources as an example, at least 1.1 billion people globally lack access to safe drinking water and 2.6 billion people lack basic sanitation. In the face of heavy population pressure, the ideals of economic development, social progress and environmental protection, which are shared by mankind***, are under great threat.
The population problem involves every member of the "global village", and developed countries are no exception. The rapid population growth in the United States and its per capita consumption of resources and energy, which is higher than the global average, have made people question the American-style development path. Some other developed countries are also experiencing negative population growth and social ageing. These imply that both developing and developed countries need to attach great importance to the population issue and establish a scientific population development strategy in line with their own national conditions.
Future Population
The general trend seems to be that the growth of the world's population is gradually slowing down. However, there are so many unpredictable factors (e.g. changes in birth rates, potential wars, etc.) that it is difficult to predict how many people will live in the world in the future. Different statistical methods will always give very different results. For example, current population projections for 2050 are between 7.5 billion and 10.5 billion, with the United Nations predicting a world population of 9.15 billion in 2009, but this figure was revised upwards in 2013 to 9.6 billion. The U.S. Census Bureau estimates that the world will have about 9.25 billion people in 2050. However, these projections are only indicative because there is so much uncertainty in population projections. In some countries, birth rates are falling faster than expected. China, for example, has experienced lower-than-expected population growth rates over the past few decades, which has led to a steady downward revision of the UN's projections of China's future population peaks, from more than 1.5 billion people to less than 1.4 billion.
Africa, on the other hand, will continue to grow at a faster rate over the next few decades and will be the main driver of world population growth on a continent-by-continent basis. All continents except Europe will also see significant population growth, while most developing countries will experience massive urbanization, with large numbers of people moving to large cities.
Population Distribution by Continent (Billions)
Year World Asia Africa Europe Latin America USA & Canada Oceania
2015
73.02
43.91 (60.1%)
11.53 (15.8%)
7.34 (10.1%)
6.18 (8.5%)
3.68 (5.0%)
0.38 (0.5%)
2020
76.75
45.96 (59.9%)
12.76 (16.6%)
7.33 (9.6%)
6.46 (8.4%)
3.83 (5.0%)
0.40 (0.5%)
2025
80.12
47.73 (59.6%)
14.00 (17.5%)
7.29 ( 9.1%)
6.70 (8.4%)
3.98 (5.0%)
0.43 (0.5%)
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The Earth's population will continue to grow throughout this century, and could reach 11 billion by 2100, says a new study led by the United Nations. That's 2 billion more than was previously commonly thought, and the main reason for that is the huge increase in Africa's population. The new study, published in the U.S. journal Science, concludes that Africa's total population could triple by 2100 from about 1 billion to about 4 billion by the end of the century because of persistently high fertility rates, while in the rest of the world the demographic situation is likely to be little changed. By the end of the century, most developing countries, including China, in addition to developed countries, will likewise face serious population ageing, the study said. [4]
Population explosion
The rapid and massive growth of the world's population over the past few decades, driven by industrialization and technological advances in food production that have increased birth rates in most parts of the globe, as well as by advances in medical science and technology that have led to a significant decline in death rates, is a phenomenon scientists have called a "population explosion. Scientists call this phenomenon of large increases in the natural rate of population increase the "population explosion". This phenomenon was evident in China in the 1970s, in India today and in some African countries. Excessive population growth makes human beings demand for all kinds of resources, the whole ecological environment is a kind of burden, can bring environmental pollution, resource depletion and other problems. Therefore, many countries are now trying to control population growth and reduce the fertility rate. Although in general the population growth rate in most countries is declining naturally year by year, some countries still intervene in population growth through government enforcement. However, this initiative may even bring about a sharp decline in the number of young people and aggravate the concern about population aging. And some developed countries, such as Japan and Russia, are facing the problem of low population, and the proportion of the elderly population in these countries is already very large, which has already constrained their economic development.