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| 公开/私有: | 公开 私有 |
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| 公开/私有: | 公开 私有 |
- environmental aspects (8)
- climatic changes (4)
- global environmental change (4)
- globalization (4)
- environmental policy (3)
- environmental protection (3)
- history (3)
- political aspects (3)
- arctic regions (2)
- human ecology (2)
- urbanization (2)
- water-supply (2)
- 研究 (2)
- air quality (1)
- antarctica (1)
- anti-globalization movement (1)
- biodiversity (1)
- boundaries (1)
- brulage dirige (1)
- cities and towns (1)
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