Ключевые слова: air, atmosphere, blue, building, business, chemical, chemistry, chimney, climate, cloud, coal, construction, dioxide, dirty, emission, energy, environment, environmental, exhaust, factory, fuel, fumes, gas, global, greenhouse, high, industrial, industry, manufacturing, nature, pipe, plant, pollution, power, refinery, sky, smog, smoke, smokestack, stack, station, steam, sun, technology, tower, toxic, warming, waste, water, white,