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

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United Nations - World Population Prospects 2017". Archived from the original on 2018-03-22 . Retrieved 2017-07-07. World Population Prospects 2022, Standard Projections, Compact File, Estimates tab, Life Expectancy at Birth, both sexes (years) column". United Nations Department of Economic and Social Affairs, Population Division. 2022. Kirwan, M. L. et al. Limits on the adaptability of coastal marshes to rising sea level. Geophys. Res. Lett. 37, L23401 (2010). World population growth and trends 1950-2050". US Census. Archived from the original on 2010-07-07. Vitousek, S. et al. Doubling of coastal flooding frequency within decades due to sea-level rise. Sci. Rep. 7, 1399 (2017).

As the population size rather than the territory is shown in this map, you can see some significant differences when you compare it to the standard geographical map we’re most familiar with. The Institute for Health Metrics and Evaluation (IHME) and the Insurance Institute of South Africa (IIASA) project lower fertility in Sub-Saharan Africa (SSA) in 2100 than the UN. By 2100, the UN projects the population in SSA will reach 3.8 billion, IHME projects 3.1 billion, and IIASA projects 2.6 billion. IHME and IIASA incorporate women's educational attainment in their models of fertility, and in the case of IHME, also consider met need for family planning. [10] 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] Barbier, E. B. et al. The value of estuarine and coastal ecosystem services. Ecol. Monogr. 81, 169–193 (2011).

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The following 101 metropolitan areas with the largest population projections for the years 2025, 2050, 2075, and 2100, according to professors Daniel Hoornweg and Kevin Pope, are listed below. [36] Projected populations in millions Silk, John (21 December 2019). "World's population to hit 7.75 billion in 2019". Deutsche Welle . Retrieved 14 March 2021. Vollset, Stein Emil; Goren, Emily; Yuan, Chun-Wei (July 14, 2020). "Fertility, mortality, migration, and population scenarios for 195 countries and territories from 2017 to 2100: a forecasting analysis for the Global Burden of Disease Study". The Lancet. Archived copy" (PDF). Archived from the original (PDF) on 2011-07-16 . Retrieved 2011-07-16. {{ cite web}}: CS1 maint: archived copy as title ( link)

Now you've learned the long division approach to 2100 divided by 4, here are a few other ways you might do the calculation: Crist, Eileen; Ripple, William J.; Ehrlich, Paul R.; Rees, William E.; Wolf, Christopher (2022). "Scientists' warning on population" (PDF). Science of the Total Environment. 845: 157166. Bibcode: 2022ScTEn.845o7166C. doi: 10.1016/j.scitotenv.2022.157166. PMID 35803428. S2CID 250387801. Kaneda, Toshiko; Falk, Marissa; Patierno, Kaitlyn (March 27, 2021). "Understanding and Comparing Population Projections in Sub-Saharan Africa". Population Reference Bureau.The temporal trends of SLR science are further highlighted by analysing the maturity of the knowledge foundation (i.e. age and frequency of the cited, fundamental references within each research sub-theme) (Methods and Fig. 3f) and the degree of persistence, growth, emergence, and disappearance of SLR citing articles within each sub-theme (Fig. 3g). Cited references of all sub-themes are plotted against a timeline based on their publication year, and the ‘concentration of references’ indicates the age and duration of the knowledge basis for each sub-theme (Fig. 3f). Red circles represent cited references for which citation bursts (i.e. the temporal increase in the citation counts of an article) have been recorded, with circle size indicating burst duration (i.e. a period of time over which an article received citations) (Fig. 3f). Across all sub-themes, knowledge of “coastal wetlands and estuaries”, “Quaternary sea-level”, “sedimentation and stratigraphy”, “coastal erosion and shoreline changes”, and “contemporary saltmarsh-mangrove dynamics” has been established since the 1960s with influential references distributed throughout the entire period to date. In contrast, knowledge of “pre-Quaternary sea-level”, “glacial isostatic adjustments and eustatic sea-level changes”, “earthquakes and abrupt changes”, and “geological wetlands dynamics” was primarily founded during the 1960s–1990s with limited influential references recognised after the 2000s. Finally, knowledge of “global sea-level reconstruction and projection”, “high-end sea-level and ice sheets dynamics”, “extreme sea-levels and flood hazards”, “vulnerability and adaptation”, “mega deltas”, “coastal adaptation and resilience”, and “coral reefs and atoll islands” was established during the 1980s and has been growing ever since (Fig. 3f).

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] From 2020 to 2050, the eight highlighted countries are expected to account for about half of the world's projected population increase: India, Nigeria, the Democratic Republic of the Congo, Pakistan, Ethiopia, Tanzania, Egypt, and Indonesia. [5] [6] Population projections of the largest metropolitan areas [ edit ] Hook, Chris (December 20, 2019). "Earth's population set to soar to 7.75 billion people by New year's Eve". Seven News . Retrieved January 2, 2020. Macreadie, P. I. et al. Can we manage coastal ecosystems to sequester more blue carbon? Front. Ecol. Environ. 15, 206–213 (2017). A 2020 study published by The Lancet from researchers funded by the Global Burden of Disease Study promotes a lower growth scenario, projecting that world population will peak in 2064 at 9.7 billion and then decline to 8.8 billion in 2100. This projection assumes further advancement of women's rights globally. In this case TFR is assumed to decline more rapidly than the UN's projection, to reach 1.7 in 2100. [28]Befus, K. M., Barnard, P. L., Hoover, D. J., Finzi Hart, J. A. & Voss, C. I. Increasing threat of coastal groundwater hazards from sea-level rise in California. Nat. Clim. Change 10, 946–952 (2020). Nalau, J. & Verrall, B. Mapping the evolution and current trends in climate change adaptation science. Clim. Risk Manag. 32, 100290 (2021). 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. [2] The global population has grown from 1 billion in 1800 to 7.9 billion in 2020. [3] 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. [4] 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. [5] Others have challenged many recent population projections as having underestimated population growth. [6]

The population of the More Developed regions is slated to remain mostly unchanged, at 1.2-1.3 billion for the remainder of the 21st century. All population growth comes from the Less Developed regions. [5] [6]

In 2012, the UN changed its prediction to the effect that no maximum would likely be reached in the 21st century, and that by the year 2100 world population would increase to somewhere in the range 9.6 to 12.3 billion with 10.9 billion being the midpoint of that range. [16] The main reason for the revision was a recognition that the high fertility rate in Africa was not declining as fast as had been previously assumed. [17] Passeri, D. L. et al. The dynamic effects of sea level rise on low‐gradient coastal landscapes: A review. Earth’s Future 3, 159–181 (2015). Bellard, C., Leclerc, C. & Courchamp, F. Impact of sea level rise on the 10 insular biodiversity hotspots. Glob. Ecol. Biogeogr. 23, 203–212 (2014). What is 2100 Divided by 4 Using Long Division?. VisualFractions.com. Retrieved from http://visualfractions.com/calculator/long-division/what-is-2100-divided-by-4-using-long-division/. Cilluffo, Anthony; Ruiz, Neil (June 17, 2019). "World's Population is Projected to Nearly Stop Growing by the end of the Century". Pew Research Center.