Ключевые слова: air, building, business, chemical, chimney, climate, cloud, coal, construction, dirty, ecology, electric, electrical, electricity, energy, environment, factory, fuel, fume, gas, generation, generator, global, heat, industrial, industry, manufacturing, nature, outdoor, pipe, plant, pollution, power, power plant, refinery, sky, smog, smoke, snow, station, steam, substance, sunset, technology, tower, toxic, transmision tower, warming, white, winter,