The amount of nitrogen oxides emitted by Swissair s flight operations worldwide. The amount of nitrogen oxides emitted by all SAirLines aircraft worldwide. The amount of nitrogen oxides emitted per 100 revenue tonne-kilometres by Swissair s flight operations worldwide. Boeing 747 0.55, Airbus A320 family 0.50, MD-11 0.48, Airbus A330 0.52, Airbus A310 0.71. The amount of nitrogen oxides emitted per 100 revenue tonne-kilometres by all SAirLines aircraft worldwide.
Water vapour is a by-product of any combustion process.
The water vapours emitted from aircraft engines can combine with particles to form condensation trails, which can themselves cause long cirrus clouds to form. Cirrus clouds, like greenhouse gases, can affect the Earth s retention of solar radiation.