Region
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Idaho National Laboratory Region
11
Los Angeles
11
Mexican-American Border Region
11
Pacific Area
11
Southeast Asia
11
Spain
11
British Columbia
10
Connecticut
10
Delta Region
10
Detroit Ranger District
10
Detroit Ranger District (Or.)
10
Gulf Coast
10
New England
10
Ukraine
10
Carbon County
9
Chesapeake Bay Watershed
9
Columbia River
9
Columbia River Watershed
9
Hanford Site (Wash.)
9
Italy
9
Kenya
9
Mississippi River
9
Netherlands
9
New Hampshire
9
Russia (Federation)
9
Singapore
9
South Dakota
9
Sweetwater County
9
Tanzania
9
Bangladesh
8
Malheur National Forest
8
Middle Atlantic States
8
National Petroleum Reserve
8
Oahu
8
Papua New Guinea
8
Philippines
8
Scandinavia
8
Southwest, New
8
Sublette County
8
Acadia National Park
7
Africa, Sub-Saharan
7
Beaufort Sea
7
Bhopal
7
Chesapeake Bay (Md. and Va.)
7
Colorado River (Colo.-Mexico)
7
El Niño Current
7
Europe, Eastern
7
Ghana
7
Great Basin
7
Great Plains
7
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