Ключевые слова: across, aerial, air, air traffic, airline, airplane, atmosphere, aviation, background, blue, blue sky, bright, chemical trail, chemtrails, cloud, clouds, concepts, condensation, condensation trail, condensation trails, contrail, contrails, cross, crossing, day, defocus, diagonal, flight, fly, high, line, lines, lines of wires, nature, outdoor, plane, sky, smoke, spray, stream, trace, traces in sky, trail, transport, transportation, two lines, vapour, white, wires,