A report on World population
Often used to refer to the total number of humans currently living, and was estimated to have exceeded 7.9 billion.
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Population growth
3 linksIncrease in the number of people in a population or dispersed group.
Increase in the number of people in a population or dispersed group.
The global population has grown from 1 billion in 1800 to 7.9 billion in 2020.
Black Death
2 linksBubonic plague pandemic occurring in Afro-Eurasia from 1346 to 1353.
Bubonic plague pandemic occurring in Afro-Eurasia from 1346 to 1353.
The plague might have reduced the world population from c. 475 million to 350–375 million in the 14th century.
Human impact on the environment
2 linksHuman impact on the environment (or anthropogenic impact) refers to changes to biophysical environments and to ecosystems, biodiversity, and natural resources caused directly or indirectly by humans.
Human impact on the environment (or anthropogenic impact) refers to changes to biophysical environments and to ecosystems, biodiversity, and natural resources caused directly or indirectly by humans.
Some scholars, environmentalists and advocates have linked human population growth or population size as a driver of environmental issues, including some suggesting this indicates an overpopulation scenario.
Human
1 linksHumans (Homo sapiens) are the most abundant and widespread species of primate, characterized by bipedalism and large, complex brains.
Humans (Homo sapiens) are the most abundant and widespread species of primate, characterized by bipedalism and large, complex brains.
The human population is not, however, uniformly distributed on the Earth's surface, because the population density varies from one region to another, and large stretches of surface are almost completely uninhabited, like Antarctica and vast swathes of the ocean.
Pandemic
1 linksEpidemic of an infectious disease that has spread across a large region, for instance multiple continents or worldwide, affecting a substantial number of individuals.
Epidemic of an infectious disease that has spread across a large region, for instance multiple continents or worldwide, affecting a substantial number of individuals.
In the 20th century, the world saw the biggest increase in its population in human history due to a drop in the mortality rate in many countries as a result of medical advances.
List of epidemics
1 linksList of the largest known epidemics and pandemics caused by an infectious disease.
List of the largest known epidemics and pandemics caused by an infectious disease.
For the historical records of major changes in the world population, see world population.
Demography
1 linksStatistical study of populations, especially human beings.
Statistical study of populations, especially human beings.
The figure in this section shows the latest (2004) UN (United Nations) projections of world population out to the year 2150 (red = high, orange = medium, green = low).
Projections of population growth
1 linksPopulation projections are attempts to show how the human population statistics might change in the future.
Life expectancy
1 linksStatistical measure of the average time an organism is expected to live, based on the year of its birth, its current age, and other demographic factors like sex.
Statistical measure of the average time an organism is expected to live, based on the year of its birth, its current age, and other demographic factors like sex.
Unless otherwise stated, it represents estimates of the life expectancies of the world population as a whole.
Population decline
0 linksReduction in a human population size.
Reduction in a human population size.
Over the long term, stretching from prehistory to the present, Earth's total human population has continued to grow; however, current projections suggest that this long-term trend of steady population growth may be coming to an end.