Sustainable population
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The concept of sustainable population concerns how human numbers interact with environmental limits, economic systems, and social equity. While human population size contributes to ecological impact,
Urbanization in Seattle, Washington, United States
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
Sustainable population
…depletion of non-renewable resources. This perspective reinforces the case for limiting both consumption and population growth to ensure sustainability. Population ageing Population growth…
World population pyramid from 1950 to 2100 (projected). (UN, World Population Prospects 2017)