Ключевые слова: alternative, background, bright, bulb, business, concept, conceptual, conservation, creative, earth, eco, ecological, efficiency, electricity, energy, environment, environmental, friendly, future, glass, global, glowing, grass, green, grow, growth, idea, innovation, invention, lamp, leaf, light, lightbulb, nature, planet, plant, power, protection, renewable, resource, save, sky, solar, solution, sustainability, symbol, technology, tree, warming, white,