Ключевые слова: abstract, air, airplane, altitude, aviation, blue, branch, cliff, cloud, contrail, cross, distant, environment, flight, foliage, green, growth, high, isolated, jet, landscape, leaf, line, nature, nobody, outdoors, park, pattern, peaceful, plane, remote, reserve, rock, scenic, serene, shape, sky, space, stone, symbol, trail, tranquil, transportation, travel, trees, vapour, vegetation, white,