Ключевые слова: air, atmosphere, background, blue, building, carbon, chemical, chimney, city, climate, cloud, coal, damage, danger, dirty, ecology, emission, energy, environment, environmental, factory, fog, fuel, fumes, gas, global, industrial, industry, landscape, manufacturing, nature, pipe, plant, pollution, power, sky, smog, smoke, smokestack, stack, station, steam, structure, sunset, technology, tower, toxic, urban, warming, white,