Ключевые слова: air, atmosphere, blue, building, chemical, chimney, city, climate, cloud, coal, ecology, electricity, emissions, energy, environment, environmental, factory, forest, fuel, fume, gas, global, heating, industrial, industry, landscape, manufacturing, pipe, plant, pollution, power, production, refinery, sky, smog, smoke, smoking, smoking chimneys, snow, snowbound, stack, steam, technology, thermal, tower, toxic, tree, warming, white, winter,