Ключевые слова: air pollution, carbon dioxide, chemical plant, chimney, cloud, cloudscape, coal, construction site, cooling tower, dawn, dioxide, distillation tower, environment, factory, fossil fuel, fumes, gasoline, global warming, heavy industry, industry, lake, moody sky, nature, pollution, power station, refinery, sky, smog, smoke, smoke stack, steam, sunrise, technology, tower, toxic substance, twilight, vapor trail, water, wind,