Ключевые слова: air, atmosphere, background, building, business, chemical, chimney, climate, cloud, coal, contamination, damage, danger, dioxide, dirty, ecology, emission, emissions, energy, environment, environmental, exhaust, factory, fuel, fumes, gas, global, global warming, industrial, industry, manufacture, manufacturing, nature, pipe, plant, pollution, power, power station, sky, smog, smoke, smokestack, stack, station, steam, technology, tower, toxic, warming, white,