Region
Afrique du Sud
1
Amérique du Nord
1
Asia
2
Atlantic Ocean
1
Atlantique Nord (Océan)
1
Australasia
1
Australia
2
Central Europe
1
Chesapeake Bay Region
1
Chesapeake Bay Region (Md. and Va.)
1
China
2
Colorado
1
Czech Republic
4
Delta County
1
Delta County (Colo.)
1
Developing countries
1
Estonia
1
Europe
4
Europe, Central
1
États-Unis
3
États-Unis (Ouest)
1
France
2
Fremont County
1
Fremont County (Colo.)
1
Grands Lacs (Amérique du Nord)
1
Great Britain
8
Great Lakes
1
Great Lakes (North America)
1
India
1
Iraq
1
Ireland
4
Irlande
1
Israel
1
Italy
2
Japan
2
Japon
1
Korea
1
Korea (South)
1
Lander
1
Lander (Wyo.)
1
Mediterrane Subtropen
1
Mediterranean Region
2
Méditerranée, Région de la
1
New Zealand
1
Nigeria
1
North America
2
North Atlantic Ocean
1
OECD countries
1
Pacific Ocean
1
Pakistan
2
more ...