Region
Developing countries
21
Europe
12
Africa
9
Great Britain
8
United States
8
European Union countries
7
Asia
5
Brazil
3
China
3
India
3
Latin America
3
Africa, Sub-Saharan
2
Asia, Southeastern
2
Netherlands
2
Scotland
2
Amazon River Estuary
1
Amazon River Estuary (Brazil)
1
Amazon River Region
1
Aral Sea (Uzbekistan and Kazakstan)
1
Asia, Central
1
Australia
1
Barbados
1
Columbia River Watershed
1
Corsica (France)
1
Cuba
1
England
1
Europe, Central
1
Europe, Eastern
1
Former Soviet republics
1
Ganges River Valley (India and Bangladesh)
1
Germany
1
India, Northeastern
1
Indian Ocean Region
1
Indonesia
1
Ireland
1
Manchester
1
Mediterranean Region
1
Montserrat
1
Mozambique
1
Pacific Area
1
Rhine River Watershed
1
Roraima
1
Roriama
1
Russia (Federation)
1
South Africa
1
South Asia
1
Southeast Asia
1
Sweden
1
Tropics
1