Ключевые слова: alternative, background, bulb, concept, conceptual, creative, earth, echo, ecology, electric, electricity, energy, environment, environmental, glass, global, green, growth, idea, illustration, innovation, inside, isolated, lamp, leaf, light, lightbulb, nature, planet, plant, power, protection, renewable, responsibility, save, solar, solution, sustainability, sustainable, symbol, technology, tree, warming,