Ключевые слова: alternative, background, bright, bulb, concept, conceptual, conservation, creative, design, earth, eco, ecological, ecology, efficiency, efficient, electric, electricity, energy, environment, environmental, glass, global, glowing, graphic, grass, green, growth, idea, innovation, lamp, led, light, lightbulb, natural, nature, plant, power, recycling, renewable, resource, save, saving, sky, solar, solution, sustainability, symbol, technology, world,