By the middle of the century, a majority of countries still enjoying the demographic dividend of youth will be in sub-Saharan Africa, UN figures show.
Professor Sarah Harper comments on demographic changes in an article in The Observer - Ageing planet: the new demographic timebomb.
"We are in transition across the 21st century and need to adjust to this age-structural transition, rather than fight it", said Harper.
►Read the full article: Ageing planet: the new demographic timebomb
