Learning Outcomes: 3.1, 3.3, 3.9 18 Population Learning Intentions
You will be able to: Describe how a country’s population changes as it moves through each stage in the demographic transition model
Describe the characteristics displayed by countries at each stage of the demographic transition model
Describe how the population has changed in Ireland and in a developing country over time.
18.1 World Population
The world’s population has increased over time. Population growth has occurred at uneven and fluctuating (up and down) rates. There have been times when the population has increased and times when it has decreased. In 2022, the world’s population reached 8 billion, and is growing steadily.
1. The projected world population until 2100 264
1990 2017 2030 2050 2100
Demography Birth rate Death rate
Natural increase Natural decrease Population cycle Demographic
transition model Globalisation Interconnected
Population pyramid Age–sex structure Expansive
Constrictive Stationary
World population Projected world population until 2100