Ключевые слова: air, atmosphere, bad, cancer, carbon, chemical, chimney, cloud, co2, coal, dioxide, dirty, disaster, disease, dust, eco, ecology, effect, electricity, emission, emissions, energy, environmental, exhaust, factory, fall, fingers, flue, fuel, fumes, gases, global, greenhouse, industrial, industry, isolated, neutral, oxygen, pictogram, poison, pollution, puff, sky, smog, smoke, steam, technology, warming, warning, writing,