Ключевые слова: air, building, carbon, chemical, chimney, city, climate, cloud, coal, condensation, construction, dirty, ecology, electric, electricity, energy, environment, exhaust, factory, fog, fuel, gas, generation, global, industrial, industry, mining, nature, pipe, pipeline, pollution, power, refinery, sky, smog, smoke, snow, station, steam, sunset, tall, technology, tower, toxic, urban, view, warming, white, winter,