Ключевые слова: alternative, bulb, concept, creative, earth, eco, ecologic, ecology, electricity, energy, environment, environmental, glass, global, grass, green, green energy, growth, idea, innovation, invention, lamp, leaf, light, lightbulb, natural, nature, plant, pollution, power, protection, recycle, renewable, resource, save, savings, seedling, solar, sustainable, symbol, technology, tree, warming,