Ключевые слова: air, atmosphere, blue, building, burning, chemical, chimney, chimneys, climate, clouds, coal, damage, dirty, ecology, emissions, energy, environment, environmental, factory, fuel, gas, global, greenhouse, industrial, industry, manufacturing, pipe, plant, pollution, power, process, producing, refinery, sky, smog, smoke, smoking, stack, steam, technology, tower, warming, white, wood, woodworking,