Ключевые слова: alternative, background, bulb, concept, creative, earth, eco, ecologic, ecological, ecology, efficiency, electric, electricity, energy, environment, environmental, friendly, future, glass, global, green, growth, hand, idea, innovation, inside, invention, lamp, leaf, light, light bulb, lightbulb, natural, nature, planet, plant, power, renewable, resource, responsibility, save, solar, solution, sustainability, sustainable, symbol, technology, tree, warming, white,