Ключевые слова: background, business, care, community, concept, conservation, crystal, day, development, earth, eco, ecology, ecosystem, energy, environment, environmental, forest, glass, global, globe, grass, green, growth, hand, hold, holding, human, leaf, life, light, map, natural, nature, peace, person, planet, plant, protect, protection, recycling, responsibility, safe, safety, save, sphere, sunlight, sustainable, tree, world,