Ключевые слова: background, building, bulb, city, cityscape, clean, clear, concept, construction, development, earth, eco, ecologic, ecological, ecology, electric, electricity, energy, environment, environmental, future, glass, global, green, idea, innovation, invention, lamp, life, lightbulb, natural, nature, planet, plant, power, protect, recycle, renewable, resource, reusable, saving, symbol, technological, technology, urban, warming, waste,