Ключевые слова: air, atmosphere, background, beauty, blue, breath, breathe, breathing, clean, climate, cloud, clouds, cloudscape, concept, depicted, earth, eco, ecological, ecology, ecosystems, environment, environmental, fluffy, formations, green, health, heaven, natural, nature, organic, outdoor, oxygen, planet, pollution, problem, promoting, protection, quality, save, saving, sign, sky, skyscape, sunlight, symbol, textured, weather, word,