Subject Region
United States
47
Canada
6
Great Britain
6
France
5
England
4
Africa, Sub-Saharan
3
China
3
Europe
3
Ohio
3
Germany
2
Japan
2
Nigeria
2
Africa
1
Alabama
1
Alaska
1
Athens
1
Australia
1
Austria
1
Bangladesh
1
Developing countries
1
Espana
1
Greece
1
India, North
1
Ireland
1
Italy
1
Latvia
1
Lebanon
1
Mekong River Watershed
1
New Zealand
1
Otago
1
Rome
1
Russia
1
San Francisco (Calif.)
1
Saskatchewan
1
Scotland
1
South Asia
1
Southeast Asia
1
Spain
1
Sweden
1
Sylhet
1
Sylhet (Bangladesh)
1
Syria
1
Tuscaloosa
1
Tuscany
1
Urakawa-cho
1
Wales
1