Ключевые слова: background, blue, chimney, cloud, color, crimson, dawn, daybreak, dusk, east, ecology, emission, energetics, environment, evening, factory, gamut, horizon, industrial, landscape, lilac, morning, nightfall, pink, pipe, plant, pollution, power, purple, red, rose, scarlet, sky, smoke, spectrum, steam, sunlight, sunrise, sunset, tower, tube, urban, vermilion, view, violet, vivid, west,