Ключевые слова: alternative, background, bulb, care, clean, concept, conservation, consumption, copy, creativity, day, development, discovery, earth, eco, ecology, efficiency, electricity, energy, environment, friendly, green, idea, innovation, invention, lamp, leaf, leaves, light, lightbulb, natural, nature, planet, power, protection, recycle, renewable, resource, responsibility, reusing, save, saving, science, sharing, space, sustainable, technology, top, view,