4. Global population growth
1990
World Population
PROJECT WORLD POPULATION UNTIL 2020
2015
2030
2050
2100
5.3
billion
7.3
billion
8.5
billion
9.7
billion
11.2
billion
10
9
8
7
6
5
4
3
2
1
0
1950
Population (billions)
Least Developed
Countries
Less
Developed
Countries
1970 1990 2010 2030 2050
Source: United Nations Department of Economic and Social Affairs, Population Division, World Population Prospects: The 2015 Revision