Ключевые слова: air, atmosphere, blue, building, business, carbon, chemical, chimney, clouds, color, construction, corporate, dirty, ecology, emission, energy, engineering, environment, environmental, factory, fuel, gas, global, industrial, industry, manufacturing, metal, modern, oil, orange, pipes, plant, pollute, pollution, production, products, rain, research, science, sky, smog, smoke, steel, storage, structure, technology, toxic, warming, work,