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- Air -- Pollution -- South Africa -- Cape Town 1
- Air -- Pollution -- South Africa -- Western Cape 1
- Air -- Quality 1
- Air bases -- South Africa -- Cape Town -- Performance -- Management 1
- air conditioning 1
- Air conditioning -- Energy conservation 1
- Air conditioning -- Energy consumption 1
- Air pollution 1
- Air pollution -- Measurement -- Zimbabwe 1
- Air pollution -- Zimbabwe 1
- Air quality 2
- Air quality -- Standards 1
- Air quality management 5
- Air quality management -- South Africa -- Cape Town 1
- Air quality management -- Zimbabwe 1
- Airlines -- Africa, Southern -- Management 1
- Airplanes -- Control surfaces -- Design and construction 1
- Airplanes -- Control systems 1
- Airplanes -- Noise 1
- Airplanes -- South Africa -- Noise 1