Ключевые слова: background, ball, bio, biology, care, clean, closeup, concept, conservation, day, design, development, earth, eco, ecology, ecosystem, energy, environment, environmental, forest, global, globe, green, growth, hand, life, map, natural, nature, organic, paper, planet, plant, protect, protection, safety, save, sphere, spring, sprout, sustainable, symbol, top, tree, world,