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