Environmental Engineering Reference
In-Depth Information
World population growth trajectory and forecasts
16,000
15,000
Estimated
14,000
Actual
13,000
UN low
UN medium
12,000
11,000
10,000
UN high
9,000
8,000
7,000
6,000
5,000
4,000
3,000
2,000
1,000
1800 1820 1840 1860 1880 1900 1920 1940 1960 1980 2000 2020 2040 2060 2080 2100
Year
Figure 1.1
World population estimates from 1800 to 2100 based on UN
projections [3]
Table 1.1
Five largest populated cities in 1950
Rank
Urban area
Population (millions)
1
New York
12.3
2
London
8.7
3
Tokyo
6.9
4
Paris
5.4
5
Moscow
5.3
Table 1.2
Estimated five most populated cities in 2015
Rank
Urban area
Population (millions)
1
Tokyo
27.2
2
Dhaka
22.8
3
Mumbai
22.6
4
Sao Paulo
21.2
5
Delhi
20.9
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