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- Soils pollution -- Environmental aspects -- South Africa 1
- Solar air conditioning 2
- Solar batteries 1
- Solar cells 3
- Solar cells -- Design and construction 1
- Solar collectors 3
- Solar collectors -- Africa, Sub-Saharan 1
- Solar energy 22
- solar energy 1
- Solar energy -- Africa, Sub-Saharan 1
- Solar energy -- Economic aspects 1
- Solar energy -- Hybrid systems 4
- Solar energy in agriculture 1
- Solar food dryers 1
- Solar heating 7
- Solar hot water system 1
- Solar panels 2
- Solar power plants 1
- Solar pumps 2
- Solar saline water conversion plants 2