Ключевые слова: air, atmosphere, background, blue, chimney, climate, cloud, contamination, damage, day, ecology, electric, electricity, emissions, energy, engineering, environment, environmental, factory, fumes, global, high, industrial, industry, landscape, nature, nobody, outdoor, pipe, pipes, plant, pollute, pollution, power, power line, sky, smoke, smokestack, station, steam, technology, tower, urban, vapor, waste, white,