Ключевые слова: air, alarm, atmosphere, bright, care for nature, chemical, chimney, city, climate, cloud, clouds, cloudy, contamination, dirty, ecology, emissions, energy, environment, environmental, factory, factory pipe smoking, factory pollution, gas, global, global warming, industrial, industrial pipe, industry, landscape, manufacturing, metallurgy, outdoors, pipe, pollution, power, power station, production, silhouette, sky, smog, smoke, steam, sun, sunrise, sunset, technology, toxic,