Ключевые слова: air, background, black, burn, chemistry, cloud, danger, dangerous, dark, ecology, energy, environment, environmental, factory, fire, floating, flowing, fog, fume, gas, gray, industrial, industry, light, magic, mist, motion, mystery, nature, nobody, pollute, pollution, refinery, sky, smog, smoke, smoky, spooky, steam, steamy, stream, swirl, toxic, vapor, warming, wave, wind,