Ключевые слова: air, atmosphere, background, blue, business, carbon, change, chemical, chimney, climate, co2, concept, construction, contamination, damage, danger, dioxide, dirty, ecology, emission, emissions, energy, environment, factory, footprint, fuel, fumes, gas, global, greenhouse, harm, industrial, industry, inscription, made, manufacturing, nature, object, outdoors, ozone, pipe, polluting, pollution, power, production, sky, smog, smoke, soot, toxic, warming, white,