Population tool: How will populations across the world change in the 21st century? (opens in new tab)

--- description: We created an interactive tool that lets you test how changes in fertility rates, life expectancy, and migration rates will change future populations. title: Population tool: How will populations across the world change in the 21st century? image: --- HomePopulation Growth How will populations change in the future? Demographers model their scenarios using assumptions about key demographic changes, most notably fertility rates, life expectancy, and migration rates. In our...