Region
United States
23
Great Britain
15
Europe
13
China
10
France
4
North America
4
Australia
3
European Economic Community countries
3
America
2
Arctic regions
2
Asia
2
Australasia
2
Egypt
2
Japan
2
Latin America
2
Saudi Arabia
2
Solar system
2
Africa
1
Africa, Sub-Saharan
1
Amazon Valley
1
Antarctic Region
1
Australie
1
BELGIUM
1
Brazil
1
Canada
1
Cold regions
1
Developing countries
1
East Asia
1
Europe, Eastern
1
European Union countries
1
Germany
1
Germany (Federal Republic, 1949- )
1
Gondwana (Continent)
1
India
1
Indian Ocean Region
1
Ireland
1
Italy
1
Korea (South)
1
Mexico
1
Nile River Watershed
1
North Sea
1
Pacific Area
1
Pacific area
1
Russia (Federation)
1
Régions froides
1
Scandinavia
1