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Subjects
Human beings
3
Nature
3
Human ecology
2
Child prostitution
1
Children
1
Civilization, Modern
1
Conservation of natural resources
1
Ecology
1
Environment
1
Environmental policy
1
Environmental protection
1
Fascism
1
Global environmental change
1
Heads of state
1
Human trafficking
1
Pollution
1
Prostitution
1
River engineering
1
Stream ecology
1
Sustainable development
1