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Human ecology -- United States -- History -- United States -- Environmental conditions -- History.1
Economic development -- Environmental aspects African -- Sustainable development -- Africa -- Political ecology -- Africa1
Forest Management-Nortwest,Pacific -- Forest Ecology-Nortwest,Pacific -- Forest and Foresty-Nortwest,Pacific1
Restoration ecology -- Forest ecology1
Biological Diversity Conservation -- Biotic Communities -- Ecology1
Marine ecology - Congresses1
ecology1