Ключевые слова: air, blue, building, chemical, chimney, climate, cloud, coal, construction, ecology, electric, electricity, energy, environment, environmental, factory, fuel, gas, global, greenhouse, heat, industrial, industry, landscape, manufacturing, metal, oil, pipe, plant, pollution, power, production, red, refinery, sky, smog, smoke, stack, station, steam, structure, sunset, tower, toxic, urban, vertical, warming, waste, white, work,