Ключевые слова: acid rain, air, atmosphere, blue, carbon, chemical, chimney, clear, climate, cloud, clouds, condensation, contaminate, damage, dioxide, dirty, ecology, electricity, energy, environment, environmental, exhaust, factory, fuel, fume, gas, global, industrial, industry, manufacturing, modern, pipe, plant, pollutants, polluting, pollution, power, power station, production, refinery, sky, smog, smoke, smokestack, stack, steam, toxic, vapor, warming, white,