Ключевые слова: alternative, background, bulb, concept, conservation, consumption, earth, eco, ecology, electricity, energy, environment, environmental, focus, friendly, future, global, green, hand, holding, idea, invention, lamp, light, lightbulb, natural, nature, planet, plant, power, process, protect, recycle, renewable, resource, resources, responsibility, reusable, solar, solution, sun, sunlight, sunset, sustainable, symbol, technological, technology, tree, warming, white,