Ключевые слова: alphabet, alternative, blocks, bright, bulb, concept, conservation, cube, design, earth, eco, ecologic, ecological, ecology, economy, efficiency, electric, electricity, energy, environment, environmental, equipment, fluorescent, glass, global, green, innovation, lamp, letter, light, lightbulb, message, money, natural, nature, planet, power, renewable, resource, responsibility, save, savings, solar, technology, text, wood, wooden, word,