Region
United States
59
New York (State)
11
New York
9
France
8
États-Unis
7
China
5
South Africa
5
California
4
Germany
4
Developing countries
3
England
3
Great Britain
3
Japan
3
Massachusetts
3
Austria
2
Cambridge
2
Canada
2
Europe, Eastern
2
Iran
2
Israel
2
London
2
Marcellus Shale
2
Portugal
2
Spain
2
Texas
2
USA
2
Vienna
2
West (U.S.)
2
Africa
1
Afrika
1
Afrique du Sud
1
Appalachian Region, Southern
1
Asia
1
Australia
1
Bamako
1
Bamako (Mali)
1
Belarus
1
Belgium
1
Biélorussie
1
Boston
1
Boulder City
1
Boulder City (Nev.)
1
Burkina Faso
1
Cambridge, Mass
1
Canigou Mountains
1
Canigou Mountains (France)
1
Charleston
1
Charleston (W.Va.)
1
Chine
1
Chornobylʹ
1
more ...