Ключевые слова: air, atmosphere, chemical, chimney, climate, co2, coal, contamination, danger, dirty, effect, emission, energy, environment, environmental, exhaust, factory, fume, gas, global, industrial, industry, kyoto, landscape, manufacturing, pipe, plant, pollute, pollution, power, production, sky, smog, smoke, stack, steam, sunset, technology, tower, toxic, vapor, warming,