Ключевые слова: background, begin, break, breakthrough, cement, challenge, concept, concrete, crack, creative, development, earth, ecology, endurance, environment, environmental, grass, green, ground, grow, growing, growth, hope, idea, inspiration, leaf, life, natural, nature, new, opportunity, plant, power, seed, sidewalk, single, small, spring, sprout, start, stem, strength, surface, survival, through, tree, urban, young,