Ключевые слова: aeronautics, aerospace, aircraft, airplane, atmosphere, aviation, blue sky, change, climate, clouds, cloudy sky, condensation, dramatic, dynamic, emissions, engineering, environmental impact, flight, flying, flying machine, high altitude, innovation, jet, journey, motion, overhead, plane, pollution, propulsion, science, skies, smoke trail, speed, technology, transportation, travel, vapour, weather, weather conditions, white clouds,