Ключевые слова: against, air, blue, building, carbon, chemical, chimney, clear, climate, cloud, coal, construction, contamination, day, dioxide, ecology, emission, environment, environmental, exhaust, factory, fuel, fume, gas, generation, global, heavy, industrial, industry, nature, pipe, plant, pollution, power, production, refinery, sky, smog, smoke, smokestack, stack, sunshine, tall, tower, toxic, vapor, warming,