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Population decline has many potential effects on individual and national economy.The single best gauge of economic success is growth in GDP per capita, not GDP. [1] [2] GDP per capita is an approximate indicator of average living standards, for individual prosperity. [3]
Human population projections are attempts to extrapolate how human populations will change in the future. [1] These projections are an important input to forecasts of the population's impact on this planet and humanity's future well-being. [2] Models of population growth take trends in human development and apply projections into the future. [3]
Human overpopulation (or human population overshoot) is the idea that human populations may become too large to be sustained by their environment or resources in the long term. The topic is usually discussed in the context of world population , though it may concern individual nations, regions, and cities.
The human population has experienced continuous growth following the Great Famine of 1315–1317 and the end of the Black Death in 1350, when it was nearly 370,000,000. [2] The highest global population growth rates , with increases of over 1.8% per year, occurred between 1955 and 1975, peaking at 2.1% between 1965 and 1970. [ 3 ]
Earth has a human population of over 8 billion as of 2024, with an overall population density of 50 people per km 2 (130 per sq. mile). Nearly 60% of the world's population lives in Asia, with more than 2.8 billion in the countries of India and China combined. The percentage shares of China, India and rest of South Asia of the world population ...
A global catastrophic risk or a doomsday scenario is a hypothetical event that could damage human well-being on a global scale, [2] even endangering or destroying modern civilization. [3] An event that could cause human extinction or permanently and drastically curtail humanity's existence or potential is known as an " existential risk ".
"Human population numbers as a function of food supply" (PDF). Russel Hopfenburg, David Pimentel, Duke University, Durham, NC; Cornell University, Ithaca, NY. Guinnane, Timothy W. (2023). "We Do Not Know the Population of Every Country in the World for the Past Two Thousand Years". The Journal of Economic History. 83 (3): 912–938.
[3] [4] Old estimates put the global population at 9 billion by 2037–2046, 14 years after 8 billion, and 10 billion by 2054–2071, 17 years after 9 billion; however these milestones are likely to be reached far sooner.