COLOP Date Stamp Classic Line 2100/4 Date in Numbers Imprint Colour Black 17 x 8 x 5.3 cm

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Korotayev, A. V.; Malkov, A. S. (2016). "Compact Mathematical Model of the World System Economic and Demographic Growth, 1 CE–1973 CE". International Journal of Mathematical Models and Methods in Applied Sciences. 10: 200–209. What is 2100 Divided by 4 Using Long Division?". VisualFractions.com. Accessed on November 28, 2023. http://visualfractions.com/calculator/long-division/what-is-2100-divided-by-4-using-long-division/.

According to the UN, of the predicted growth in world population between 2020 and 2050, all of that change will come from less developed countries, and more than half will come from sub-Saharan Africa. [8] Half of the growth will come from just eight countries, five of which are in Africa. [5] [6] The UN predicts that the population of sub-Saharan Africa will double by 2050. [8] The Pew Research Center observes that 50% of births in the year 2100 will be in Africa. [9] Other organizations project lower levels of population growth in Africa, based particularly on improvement in women's education and successful implementation of family planning. [10] 2. World population prospects, 2022 projection [11] Growing at a slower pace, world population is expected to reach 9.7 billion in 2050 and could peak at nearly 11 billion around 2100". United Nations Department of Economic and Social Affairs. June 17, 2019. The growth of a population can often be modelled by the logistic equation [28] d P d t = r P ( 1 − P K ) , {\displaystyle {\frac {dP}{dt}}=rP\left(1-{\frac {P}{K}}\right),}

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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 projected that it could drop even further to minus 0.1% by 2100. [4] Based on this, the UN projected that the world population, 8 billion as of 2023 [update], 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). [5] [6]

a b "World Population Prospects, Standard Projections, Archive, 2012 Revision, Total Population Both Sexes file". United Nations Department of Economic and Social Affairs, Population Division. 2012. Resident Population Data – 2010". U.S. Census Bureau. 2010. Archived from the original on 2011-10-28 . Retrieved 2010-12-22. Kiden, P., Denys, L. & Johnston, P. Late Quaternary sea‐level change and isostatic and tectonic land movements along the Belgian–Dutch North Sea coast: geological data and model results. J. Quater. Sci.: Publ. Quater. Res. Assoc. 17, 535–546 (2002).An analysis from the Wittgenstein Center predicts global population to peak in 2070 at 9.4 billion and then decline to 9.0 billion in 2100. [29] Glamore, W., Rayner, D., Ruprecht, J., Sadat-Noori, M. & Khojasteh, D. Eco-hydrology as a driver for tidal restoration: Observations from a Ramsar wetland in eastern Australia. PLOS ONE 16, e0254701 (2021). Randers, Jørgen (2012). 2052: A Global Forecast for the Next Forty Years. Vermont: Chelsea Green Publishing. p.62.