Region
United States
40
Ohio
11
Africa
8
Colorado
8
New Mexico
8
Afghanistan
7
Asia
7
États-Unis
7
New York (State)
7
Antarctica
6
California
6
Missouri
6
Europe
5
Maryland
5
Pakistan
5
Pennsylvania
5
Shannon County
5
Alaska
4
Albania
4
Arctic regions
4
China
4
Iraq
4
Korea (North)
4
Massachusetts
4
Middle East
4
North America
4
Thailand
4
Amérique du Nord
3
Arizona
3
Bangladesh
3
Benin
3
Bhutan
3
Bolivia
3
Burma
3
Californie
3
Chile
3
Cyprus
3
Ecuador
3
Florida
3
Ghana
3
Greece
3
High Plains Aquifer
3
Mars (Planet)
3
Montana
3
Peru
3
Syria
3
Texas
3
Togo
3
Turkey
3
Turkmenistan
3
more ...