Ключевые слова: air, atmosphere, blue, candid, chimney, climate, closeup, cloud, coal, concept, damage, danger, dirty, ecology, energy, environment, environmental, exhaust, factory, forest, generation, global, industrial, industry, infrastructure, lanscape, manufacturing, natural, nature, nobody, pipe, plant, pollution, power, production, sky, smog, smoke, smokestack, snow, stack, station, steam, technology, thermal, thermal power plant, toxic, tube, warming, winter,