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Subject (Region)
- United States15
- Nigeria5
- Ecuador4
- Angola3
- New Zealand3
- Niger River Delta3
- Oklahoma3
- Niger River Delta (Nigeria)2
- Russia (Federation)2
- Africa1
- Alaska1
- Arctic National Wildlife Refuge1
- Arctic National Wildlife Refuge (Alaska)1
- Bolivia1
- Bosque Seco Chiquitano, Cerrado y Pantanal Boliviano1
- Bosque Seco Chiquitano, Cerrado y Pantanal Boliviano (Bolivia)1
- Colombia1
- Government policy1
- Italy1
- Parque Nacional Yasuni1