Population ageing
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Population ageing is an overall change in the ages of a population. This can typically be summarised in a single parameter as an increase in the median age. Causes are a long-term decline in fertility
World population pyramid from 1950 to 2100 (projected). (UN, World Population Prospects 2017)
Population decline
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Population decline, also known as depopulation, is a reduction in a human population size. Earth's total human population continues to grow, as it has done throughout history, but projections suggest
Population ageing
…Political demography Population decline Senescence…
An abandoned house in Yubari district, Hokkaido, an area which has suffered sharp population decline
Ukrainian refugees entering Romania, 5 March 2022
Thousands of abandoned villages are scattered across Russia.
Stamp depicting Russian soldier killed in Ukraine. The war in that country has further exacerbated Russia's demographic crisis.