Region
United States
615
Great Britain
39
China
26
Europe
24
Developing countries
20
India
18
Outer space
16
Japan
15
Australia
14
California
13
Canada
11
France
11
New York (State)
11
Asia
10
Africa
9
England
8
Germany
7
Italy
7
Netherlands
7
North America
7
Texas
7
Middle East
6
New Mexico
6
Washington (State)
6
European Union countries
5
Michigan
5
Russia
5
Russia (Federation)
5
Alaska
4
Florida
4
Hanford Site
4
Latin America
4
Massachusetts
4
New York
4
Scandinavia
4
Alberta
3
Arctic regions
3
Arizona
3
Austin
3
Brazil
3
Carlsbad Region
3
Colorado
3
Glen Canyon Dam (Ariz.)
3
Indonesia
3
Mexico, Gulf of
3
Middle West
3
Mississippi River
3
Nevada
3
OECD countries
3
South Carolina
3
more ...