Ключевые слова: air, backgrounds, beauty in nature, blue, clean, cloud, cloudscape, color image, comfortable, contrasts, creativity, day, dreams, empty, environment, flying, freedom, freshness, gray, heaven, high up, horizontal, ideas, idyllic, imagination, incentive, inspiration, meteorology, motivation, nature, outdoors, ozone layer, powder blue, royal blue, scenics, single object, sky, sky only, space, stratosphere, sun, sunny, sunrise, tranquil scene, transparent, vitality, weather, white, wispy,