Ключевые слова: alternative, background, bulb, business, concept, creative, deposit, earth, eco, ecology, economic, economy, efficiency, electric, electricity, energy, environment, finance, financial, future, global, global warming, green, hand, idea, innovation, invention, lamp, leaf, led, light, lightbulb, money, natural, nature, planet, plant, power, renewable, save, savings, solar, solar power, sunlight, sunset, sustainable, symbol, technology, tree, world,