Region
United States
231
Alaska
13
New Mexico
9
California
7
Marshall Islands
6
Puerto Rico
6
Colorado
4
Mexico, Gulf of
4
Northern Mariana Islands
4
China
3
Guam
3
Micronesia (Federated States)
3
Nevada
3
United States Virgin Islands
3
West (U.S.)
3
Yucca Mountain
3
Hawaii
2
Montana
2
Russia (Federation)
2
Tongass National Forest
2
Tongass National Forest (Alaska)
2
Washington (State)
2
American Samoa
1
Arctic National Wildlife Refuge
1
Arctic National Wildlife Refuge (Alaska)
1
Arctic regions
1
Arizona
1
Asia
1
Denali National Park and Preserve
1
Eddy County
1
Edison (Township)
1
Elwha River Region
1
Elwha River Watershed
1
Europe, Eastern
1
European Union countries
1
Farmington Region
1
Grand Canyon National Park (Ariz.)
1
Gulf States
1
Hanford Site
1
Hanford Site (Wash.)
1
India
1
Iraq
1
Komi
1
Korea (North)
1
Mexican-American Border Region
1
New Jersey
1
North America
1
Olympic National Park (Wash.)
1
Palau
1
Pecos River Watershed (N.M. and Tex.)
1
more ...