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- Sustainable development822
- Environmental policy125
- Sustainable agriculture118
- Economic development86
- Rural development61
- Environmental protection56
- Regional planning47
- Agriculture46
- Natural resources45
- Conservation of natural resources42
- Sustainable forestry38
- City planning33
- Sustainable urban development24
- Globalization23
- Biodiversity conservation22
- Community development22
- Indians of South America22
- Forest management20
- Ecotourism19
- Poverty19
