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| English | Catalan |
| aircraft engine emission The formation and discharge of gaseous and particulate pollutants into the environment, especially the stratosphere, chiefly from airplanes, helicopters and other high-altitude aircrafts | emissió de motors aeris |
| aircraft noise Effective sound output of the various sources of noise associated with aircraft operation, such as propeller and engine exhaust, jet noise, and sonic boom | soroll d'aeronaus |