Ключевые слова: air, atmosphere, blue, carbon, chemical, chimney, climate, contamination, danger, dioxide, dirty, ecology, electricity, emissions, energy, environment, environmental, exhaust, factory, fog, fuel, fumes, gas, generation, global, high, industrial, industry, manufacturing, nature, pipe, plant, pollution, power, refinery, sky, smog, smoke, smokestack, stack, station, steam, sun, technology, tower, toxic, vapor, warming, waste, white,