Ключевые слова: background, bio, business, care, clean, concept, conservation, crystal, day, development, earth, eco, ecology, energy, environment, environmental, forest, glass, global, globe, grass, green, growth, hand, holding, hope, icon, idea, landscape, leaf, life, map, money, natural, nature, new, people, planet, plant, protection, recycle, responsibility, safe, save, social, sustainable, symbol, technology, tree, world,