Ключевые слова: background, bio, biology, business, care, clean, climate, concept, conservation, day, development, earth, eco, ecological, ecology, ecosystem, energy, environment, environmental, forest, friendly, global, globe, grass, green, growth, hand, holding, hope, human, idea, leaf, life, map, natural, nature, people, planet, plant, protection, recycle, responsibility, safe, save, sphere, sustainable, symbol, tree, world,