Ключевые слова: air, and steam, antirust, blue, bright, buildings, business, carbon, carbon dioxide, chemistry, chimney, climate warming, color, dark, dirty, energy, environment, equipment, factories, fossils, gas, global, industrial, industry, level, light, metal, oil, oil refineries, old, outdoor, pictures, pollution, power, power plants, production, science and technology, sky, smoke, smoking, stack, steel mill equipment, steel rolling mill, storage, the fuel, towers, tube,