NEEDS, RATIONALE AND CONCEPTUAL ALTERNATIVES FOR COMBATTING AIRCRAFT POLLUTIONS
Depletion of the ozone layer in the upper atmosphere has the potential to change its chemistry and the Earth's environment. Various pollutants affect this depletion, which started as early as in the 1930's. High altitude aircraft bring pollution to a fairly quiet range of the atmosphere, closer to the ozone layer than ground pollution. The aircraft pollution problem represents a large scale integrated system engineering problem where many requirements conflict and must be traded off. The system engineering principles have been applied to a conceptual study of the aircraft transportation system, its interface with the global environment and the social structures in the society and to the analysis and conceptual design of plans to combat the pollution effects from civil jet aircraft.