Region
United States
403
Great Britain
10
Australia
9
China
8
England
5
New York (State)
5
California
4
Illinois
4
India
4
Texas
4
Virginia
4
Canada
3
Germany
3
Long Island
3
North Carolina
3
Ontario
3
Utah
3
Alabama
2
Appalachian Region
2
Chicago
2
Developing countries
2
France
2
Hanford Site (Wash.)
2
Ireland
2
Japan
2
Kentucky
2
London
2
Mexico
2
Nevada
2
New York
2
Newfoundland and Labrador
2
Ohio
2
Oregon
2
Puerto Rico
2
Rhode Island
2
Romania
2
St. Lawrence
2
Toronto
2
Uganda
2
Washington (D.C.)
2
Washington (State)
2
Afrique du Sud
1
Ahmadābād
1
Alberta
1
Amundsen Scott South Pole Station (Antarctica)
1
Ann, Cape (Mass.)
1
Arab countries
1
Asia
1
Athabasca River
1
Athabasca River Watershed
1
more ...