Ключевые слова: alternative, background, blue, building, bulb, clean, climate, concept, conservation, day, earth, eco, ecological, ecology, ecosystem, electric, electricity, energy, environment, environmental, friendly, future, generation, global, green, hand, home, idea, industry, innovation, lamp, light, lightbulb, natural, nature, planet, plant, pollution, power, protection, recycle, recycling, renewable, resource, saving, sustainable, symbol, technology, turbine, white,