Ключевые слова: air, background, blue, bright, chemistry, chimney, clouds, construction, dark, day, detail, ecology, effect, emissions, energy, engineering, environment, factory, filter, fuel, gas, gasoline, heat, home, industrial, industry, lights, machine, oil, petrol, petroleum, pipe, plant, pollution, power, pressure, production, shines, sky, smoke, smokestack, steel, sun, sunlight, technology, toned, top, tower, tube, urban,