Ключевые слова: air, big, building, carbon, chemical, chimney, climate, contamination, damage, danger, dioxide, ecological, ecology, emissions, energy, environment, environmental, europe, evaporation, exhaust, facility, factory, fuel, fumes, gas, global, gray, heat, industrial, industry, landmark, pipe, poison, poisoning, pollution, risk, sky, smog, smoke, steam, substance, technology, thermal, tower, toxic, urban, vapor, warming, waste,