Ключевые слова: aerospace industry, air vehicle, airplane, blue, business, business finance and industry, carbon dioxide, clear sky, commercial airplane, control, cruise, dirt road, engine, fly, flying, footpath, four objects, fumes, greenhouse gas, high up, industry, jet engine, journey, land vehicle, large, mode of transport, modern, mountain pass, moving up, outdoors, passenger, pollution, sky, social issues, speed, sunny, traffic, transportation, travel, vapor trail, vertical, wind,