Ключевые слова: air, atmosphere, buildings, chemical, chimney, chimneys, climate, cloudy, coal, contamination, danger, dirty, dusk, ecological, ecology, energy, environment, environmental, factory, fiery, fume, gas, global, green, health, industrial, industry, insudtrial, landscape, manufacturing, nature, outdoors, outside, pipe, plant, pollution, power, scenic, sky, skyline, smog, smoke, station, steam, technology, thermoelectric, toxic, tree, urban, warming,