Ключевые слова: aerial, air, atmosphere, carbon, chemical, chimney, climate, cloud, coal, cold, danger, dioxide, dirty, ecology, emission, energy, environment, environmental, exhaust, factory, fuel, fume, gas, global, heat, industrial, industry, manufacturing, overhead, pipe, pipes, plant, pollution, power, refinery, sky, smog, smoke, smokestack, snow, stack, steam, technology, top, toxic, warming, winter,