Region
United States
37
China
34
Africa
29
Developing countries
28
India
23
Asia
17
Europe
14
Japan
8
European Union countries
7
Brazil
6
East Asia
6
Bangladesh
5
Latin America
5
Southeast Asia
5
Africa, Sub-Saharan
4
Arctic regions
4
Australia
4
Balkan Peninsula
4
Islamic countries
4
Pacific Area
4
Singapore
4
South Asia
4
Egypt
3
Florida
3
Sweden
3
Tropics
3
Vietnam
3
Costa Rica
2
Germany
2
Indonesia
2
Italy
2
Jordan River Valley
2
Malaysia
2
Mediterranean Region
2
Mexico
2
Nigeria
2
Norway
2
Sundarbans (Bangladesh and India)
2
Africa, East
1
Ajusco (Mexico)
1
Algeria
1
Alps Region
1
Amazon River Region
1
Amazonas
1
America
1
Asia, Central
1
Belgium
1
Canada
1
Canada, Northern
1
Caribbean Area
1
more ...