Ключевые слова: air, background, building, business, carbon, care, climate, concept, darkness, day, earth, eco, ecology, effected, energy, environment, environmental, factory, fuel, global, globe, green, hand, healthy, human, industrial, industry, life, nature, peace, people, planet, polluting, pollution, power, problem, protect, protection, reaching, save, smog, smoke, spinning, symbol, warming, water, world,