Ключевые слова: background, bio, biology, care, community, concept, conservation, creative, day, development, earth, earth day, eco, ecological, ecology, ecosystem, energy, environment, environmental, forest, forest conservation, friendly, global, globe, grass, green, growth, health, human, life, natural, nature, organic, plant, protect, protection, recycle, responsibility, safe, save, save clean planet, saving, saving environment, sustainability, sustainable, tree, water, wooden block, world,