United States 1,734
Developing countries 62
Great Britain 61
China 48
California 39
Canada 38
Africa 30
Europe 28
Washington (D.C.) 28
Japan 27
India 26
Asia 24
England 16
Northwest, Pacific 16
Australia 15
Iraq 15
Latin America 15
Québec (Province) 15
Brazil 14
États-Unis 12
Germany 12
North America 11
Québec 11
West (U.S.) 11
Colombia 10
Europe, Eastern 10
Mexico 10
New York (State) 10
Spain 10
France 9
Indonesia 9
Israel 9
OECD countries 9
Africa, Southern 8
Africa, Sub-Saharan 8
Colorado 8
Florida 8
Massachusetts 8
Middle East 8
Nevada 8
New York 8
South Africa 8
Texas 8
Tropics 8
Washington Metropolitan Area 8
European Union countries 7
London 7
Outer space 7
Afghanistan 6
Alaska 6
Arizona 6
East Asia 6
Georgia 6
Mexican-American Border Region 6
New Mexico 6
Virginia 6
Yellowstone National Park 6
Eastern Europe 5
Italy 5
Mediterranean Region 5
Michigan 5
Middle West 5
Nile River Watershed 5
Pennsylvania 5
Russia (Federation) 5
Southern Africa 5
Bali (Indonesia : Province) 4
Bali (Province) 4
Central America 4
Europe, Central 4
Germany (West) 4
Illinois 4
Mexico, Gulf of 4
North Carolina 4
Northeastern States 4
Norway 4
Ohio 4
Oregon 4
Peru 4
Southeast Asia 4
Southern States 4
Sweden 4
Switzerland 4
Tennessee River Valley 4
USA 4
Yosemite National Park (Calif.) 4
Yucca Mountain 4
Yugoslavia 4
Africa, Eastern 3
America 3
Arlington 3
Blue Mountains (Or. and Wash.) 3
Bolivia 3
Boston 3
Cameroon 3
Chicago 3
Chile 3
Chine 3
Delta Region 3
Eastern Africa 3