Ключевые слова: background, bio, biology, business, care, clean, concept, conservation, day, development, earth, eco, ecology, ecosystem, energy, environment, environmental, forest, friendly, glass, global, globe, grass, green, growth, holding, human, leaf, life, map, natural, nature, people, planet, plant, protect, protection, recycle, responsibility, safe, save, social, sunlight, sustainability, sustainable, tree, world,