Ключевые слова: alternative, brightly, bulb, children, concept, conservation, consumption, earth, eco, ecology, economy, electric, electrical, electricity, energy, environmental, friendly, future, global, graphic, hold, idea, innovation, invention, lamp, light, lightbulb, office, planet, power, process, protect, recycle, renewable, resource, responsibility, setting, signs, solar, solution, sun, sunlight, sunrise, sunset, sunshine, sustainable, symbol, technology, warm, warming,