Ключевые слова: air pollution, chemical, chemicals, chimney, chimneys, climate, climate change, clouds, dusk, emissions, energy, environment, environmental, evening, factory, fuel, fume, fumes, gas, global warming, health, heavy, heavy smoke, industrial, industry, landscape, manufacture, manufacturing, orange, petrochemical, pipe, pollution, power plant, production, refinery, sky, smog, smoke, steam, sunset,