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Subject
- Population[remove]53
- Economic development7
- Human ecology7
- Environmental policy3
- Fertility, Human3
- Pollution3
- Birth control2
- Demography2
- Economics2
- Food supply2
- Marxian economics2
- Nature2
- Quality of life2
- AIDS (Disease)1
- Age distribution (Demography)1
- Biological fitness1
- Cities and towns1
- Conservation of natural resources1
- Consumption (Economics)1
- Coral reefs and islands1