Subject Region
United States
366
China
47
Great Britain
29
California
28
Europe
25
Canada
22
India
20
Japan
18
New York (State)
18
Spain
14
Mexico, Gulf of
13
Australia
12
European Union countries
12
Pennsylvania
12
Espana
11
Mexico
11
Ukraine
11
Developing countries
10
Alaska
8
Brazil
8
Great Lakes (North America)
8
Massachusetts
8
Washington (State)
8
Arctic regions
7
England
7
France
7
Fukushima-ken
7
Hawaii
7
Love Canal Chemical Waste Landfill (Niagara Falls, N.Y.)
7
Oahu
7
Venezuela
7
Ganges River (India and Bangladesh)
6
Italy
6
Mississippi River
6
New York
6
North America
6
Ontario
6
Soviet Union
6
West Virginia
6
Black Sea
5
Chesapeake Bay (Md. and Va.)
5
Colombia
5
London
5
Marshall Islands
5
Northern Hemisphere
5
Rongelap Atoll
5
Russia (Federation)
5
Texas
5
Afghanistan
4
Baltic Sea
4
more ...