Subject Region
United States
8
Australia
6
Texas
5
Edwards Aquifer
3
North America
3
Costa Rica
2
Edwards Aquifer (Tex.)
2
Great Barrier Reef (Qld.)
2
Great Britain
2
Latin America
2
Texas, South
2
Anacapa Island (Calif.)
1
Belgium
1
Brazil
1
California
1
Channel Island National Park (Calif.)
1
Europe
1
European Union countries
1
Indonesia
1
Maintenance
1
New Guinea
1
Nisqually Indian Tribe of the Nisqually Reservation, Washington
1
Nisqually River Watershed
1
Northwest, Pacific
1
Pacific Ocean
1
Riverside County
1
Spain
1
Washington (State)
1