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Subject
- Economic aspects41
- Emissions trading40
- Greenhouse gas mitigation19
- Law and legislation18
- Climatic changes12
- Carbon offsetting7
- Carbon taxes6
- Aircraft exhaust emissions5
- Government policy5
- International cooperation5
- Carbon dioxide mitigation4
- Environmental aspects4
- Aeronautics, Commercial3
- Climate change mitigation3
- Environmental impact charges3
- Air2
- Air quality management2
- Environmental policy2
- International law2
- Pollution2