Region
United States
1,884
California
12
Iraq
10
China
6
Iran
6
Middle East
6
West Virginia
6
Africa, West
4
Alaska
4
Canada
4
Latin America
4
Northeastern States
4
Russia (Federation)
4
West (U.S.)
4
Developing countries
3
Europe
3
Europe, Western
3
Guinea, Gulf of
3
Japan
3
New York (State)
3
North America
3
Brazil
2
Caribbean Area
2
Caspian Sea Region
2
Eurasia
2
Middle West
2
Mississippi
2
New England
2
Pacific Area
2
Africa, North
1
Africa, Sub-Saharan
1
Appalachian Region
1
Appalachian region
1
Arctic National Wildlife Refuge
1
Arizona
1
Arkansas
1
Colorado
1
Connecticut
1
Economic conditions
1
Energy policy
1
France
1
Great Britain
1
India
1
Kotzebue (Alaska)
1
Louisiana
1
Mexico
1
Mexico, Gulf of
1
Minnesota
1
Montana
1
Nevada
1
more ...