Region
United States
302
États-Unis
123
New York (State)
40
USA
27
Alaska
21
Canada
16
Europe
16
Prince William Sound Region
16
Hudson River (N.Y. and N.J.)
14
California
13
Ukraine
13
New York (État)
12
China
11
Chornobylʹ
10
Developing countries
9
Great Britain
9
Montana
9
Washington (State)
9
Japan
8
New York
8
Appalachian Region
6
Etats-Unis d'Amérique
6
European Union countries
6
Grande-Bretagne
6
Hudson (N.Y. et N.J. : Fleuve)
6
Hudson River
6
North America
6
Pennsylvania
6
Etats-Unis
5
Hanford Site
5
Hanford Site (Wash.)
5
India
5
Mexico, Gulf of
5
Ohio
5
Pays de l'Union européenne
5
Tschernobyl
5
Alberta
4
Amérique du Nord
4
Asia
4
Great Lakes Watershed (North America)
4
Gulf of Mexico
4
Illinois
4
Japon
4
Long Island Sound (N.Y. and Conn.)
4
Marcellus Shale
4
Ontario
4
Persian Gulf Region
4
Texas
4
Tropics
4
Belarus
3
more ...