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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 (7)
- management (5)
- mathematical models (3)
- pollution (3)
- power resources (3)
- recycling (3)
- technological innovations (3)
- carbon dioxide mitigation (2)
- climatic changes (2)
- conservation of natural resources (2)
- economic aspects (2)
- economic history (2)
- emergency management (2)
- environmental justice (2)
- environmental policy (2)
- environmentalism (2)
- food supply (2)
- survival (2)
- air (1)
- air quality management (1)
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