Ключевые слова: ball, bulb, change, city, climate, concept, conservation, cozy, darkness, day, dwarf, earth, eco, ecology, electricity, energy, environment, environmental, fairy, forest, future, garland, global, green, holiday, hour, illumination, international, lamp, light, lightning, magic, nature, night, planet, power, protect, responsibility, save, saving, sphere, sustainable, switch, symbol, technology, time, twilight, universe, world,