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Ключевые слова:
air, atmosphere, building, chemical, chimney, climate, coal, contamination, damage, danger, dioxide, dirty, earth, ecology, electricity, emission, energy, environment, environmental, exhaust, factory, fuel, gas, global, global warming, heat, industrial, industry, landscape, manufacturing, nature, pipe, polluting, pollution, power, production, rubbish, sky, smog, smoke, smokestack, stack, station, steam, technology, tower, toxic, vapor, waste,