Ключевые слова: air, chimney, city, climate, cloud, co2, color, dirty, ecology, emission, energy, environment, environmental, factory, fog, funnel, gas, global, high, industry, landscape, light, mask, nature, oil, ozone, pipes, plant, power, production, refinery, sky, skyline, smog, smoke, smokestack, stack, station, sun, sunset, toxic, water,