Ключевые слова: background, beginning, bio, biology, care, concept, conservation, day, development, dirt, earth, eco, ecological, ecology, energy, environment, environmental, forest, fresh, friendly, garden, global, green, ground, grow, growing, growth, land, leaf, life, natural, nature, new, plant, protect, protection, sapling, save, seed, seedling, small, soil, spring, sustainability, sustainable, tree, water, world, young,