Region
Europe
34
United States
34
European Union countries
31
European Economic Community countries
18
Great Britain
9
Asia
4
Europe, Eastern
4
Africa
2
Developing countries
2
Germany
2
Islamic countries
2
Japan
2
Mediterranean Region
2
Solar system
2
Soviet Union
2
Africa, West
1
Afrique
1
Aral Sea Watershed (Uzbekistan and Kazakstan)
1
Australia
1
Austria
1
Baltic Sea
1
Bernina Alps (Italy and Switzerland)
1
Black Sea
1
Canada
1
Caribbean Area
1
Developingcountries
1
Earth
1
East Asia
1
Europe 1992
1
Europe, Central
1
Europe, Western
1
European Union Countries
1
EuropeanEconomic Community countries
1
Former Soviet republics
1
Former Yugoslav republics
1
Frankfurt am Main (Germany)
1
Germany, West
1
Hungary
1
Hyderabad
1
Iceland
1
India
1
Indonesia
1
Kenya
1
Lune
1
Moon
1
Nairobi
1
Netherlands
1
North America
1
North Atlantic Region
1
North Sea
1
more ...