United States 801
Great Britain 16
California 14
Canada 11
Europe 10
South Africa 8
New York (State) 7
Virginia 7
Michigan 6
Southern States 6
France 5
China 3
England 3
Germany 3
Massachusetts 3
Netherlands 3
Santa Clara County 3
South Carolina 3
Washington (D.C.) 3
West (U.S.) 3
Africa 2
Arkansas 2
Detroit 2
Developing countries 2
European Union countries 2
Illinois 2
India 2
Israel 2
Japan 2
Latin America 2
Louisiana 2
New York 2
Tennessee 2
America 1
Asia 1
Boston 1
Charleston 1
Clarendon County 1
Colorado 1
Costa Rica 1
Cuba 1
Detroit (Mich.) 1
Dover (Township) 1
Egypt 1
El Salvador 1
European Economic Community countries 1
Florida 1
France, Southern 1
Germany (East) 1
Germany (West) 1
Ghana 1
Greece 1
Guantánamo Bay Naval Base 1
Hawaii 1
Hialeah (Fla.) 1
Imperial Valley (Calif. and Mexico) 1
Islamic countries 1
Kansas 1
KwaZulu-Natal 1
Lebanon 1
Little Rock 1
Mali 1
Marcellus Shale 1
Maryland 1
Mediterranean Region 1
Mexico 1
Middle East 1
Milwaukee 1
Mineral King Valley 1
Mineral King Valley (Calif.) 1
Minnesota 1
Missouri 1
Nile River Watershed 1
North America 1
Norway 1
Oregon 1
Outer space 1
Palestine 1
Parkland 1
Pennsylvania 1
Prince William County 1
Prince William County (Va.) 1
Providence 1
Rhode Island 1
Russia (Federation) 1
Scotland 1
Sierra Nevada 1
Sierra Nevada (Calif. and Nev.) 1
Southern France 1
Spain 1
Vermont 1
Wisconsin 1
Woburn 1