Ключевые слова: air, atmosphere, background, building, change, chemical, chimney, city, climate, coal, concept, damage, degradation, dirty, ecological, ecology, energy, environment, environmental, factory, fog, garbage, global, health, industrial, industry, nature, pipe, plant, plastic, polluted, pollution, power, protection, sky, smog, smoke, steam, toxic, trash, urban, view, warming, waste,