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- 研究 (3)
- conservation of natural resources (2)
- environmental justice (2)
- environmental policy (2)
- environmentalism (2)
- social policy (2)
- social service (2)
- 社会政策 (2)
- 1980- (1)
- climate change mitigation (1)
- climatic changes (1)
- democracy (1)
- economic aspects (1)
- economic conditions (1)
- economic policy (1)
- educational equalization (1)
- educational policy and politics (1)
- environmental aspects (1)
- environmental protection (1)
- food security (1)
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