Ключевые слова: boiler, building, chemical, chimney, coal, combined, cycle, dusk, electric, electrical, electricity, emission, energy, engineering, environment, facility, factory, fired, fuel, gas, generating, generation, generator, grid, heat, industrial, industry, infrastructure, light, metal, natural, oil, pipe, plant, pollution, power, production, refinery, sky, smoke, station, steam, structure, system, technology, tower, transmission, turbine, twilight, voltage,