Editing Population ageing (section)

==Around the world==
{{see also|Aging of China|Ageing of Europe|Aging of Japan|Aging of South Korea|Aging of the United States}}
[[File:Percentage of the World Population Over 65 - 1950-2050.png|thumb|upright=1.4|Percentage of world population over 65]]
The world's older population is growing dramatically.<ref>{{Cite news|url=https://www.nih.gov/news-events/news-releases/worlds-older-population-grows-dramatically|title=World's older population grows dramatically|date=2016-03-28|work=National Institute on Aging|access-date=2017-05-01|language=en}}</ref>
The more developed countries also have older populations as their citizens live longer. Less developed countries have much younger populations. [http://manyeyes.alphaworks.ibm.com/manyeyes/visualizations/percent-of-population-over-65-by-c An interactive version of the map is available here.]
[[Asia]] and [[Africa]] are the two regions with a significant number of countries facing population ageing. Within 20 years, many countries in those regions will face a situation of the largest population [[cohort (statistics)|cohort]] being those over 65 and the average age approaching 50. In 2100, according to research led by the University of Washington, 2.4 billion people will be over the age of 65, compared with 1.7 billion under the age of 20.<ref>{{Cite news |last=Harvey |first=Fiona |author-link=Fiona Harvey |date=2020-07-15 |title=World population in 2100 could be 2 billion below UN forecasts, study suggests |url=https://www.theguardian.com/world/2020/jul/15/world-population-in-2100-could-be-2-billion-below-un-forecasts-study-suggests |access-date=2020-07-16 |work=The Guardian |language=en-GB |issn=0261-3077}}</ref> The Oxford Institute of Population Ageing is an institution looking at global population ageing. Its research reveals that many of the views of global ageing are based on myths and that there will be considerable opportunities for the world as its population matures, as the Institute's director, Professor [[Sarah Harper]], highlighted in her book ''Ageing Societies''.

Most of the developed countries now have [[sub-replacement fertility]] levels, and population growth now depends largely on immigration together with [[population momentum]], which also arises from previous large generations now enjoying longer life expectancy.

Of the roughly 150,000 people who die each day across the globe, about two thirds, 100,000 per day, die of age-related causes.<ref name="doi10.2202/1941-6008.1011">{{cite journal | last = Aubrey D.N.J | first = de Grey | author-link = Aubrey de Grey | title = Life Span Extension Research and Public Debate: Societal Considerations | journal = Studies in Ethics, Law, and Technology | volume = 1 | issue = 1, Article 5 | year = 2007 | url = http://www.sens.org/files/pdf/ENHANCE-PP.pdf | archive-url = https://web.archive.org/web/20190212132207/http://www.sens.org/files/pdf/ENHANCE-PP.pdf | url-status = dead | archive-date = February 12, 2019 | doi = 10.2202/1941-6008.1011 | access-date = August 7, 2011| citeseerx = 10.1.1.395.745| s2cid = 201101995 }}</ref> In industrialised nations, that proportion is much higher and reaches 90%.<ref name="doi10.2202/1941-6008.1011"/>