Ключевые слова: air, atmosphere, blue, building, carbon, chemical, chimney, climate, cloud, co2, coal, concept, dioxide, dirty, ecology, emission, energy, environment, environmental, exhaust, factory, flat, fuel, fumes, gas, global, illustration, industrial, industry, manufacturing, nuclear, oil, pipe, plant, pollution, power, production, sky, smog, smoke, station, steam, symbol, technology, tower, toxic, vapor, warming, waste,