Ключевые слова: america, background, bio, care, climate, concept, conservation, continent, countries, crystal, day, development, earth, eco, ecology, ecosystem, environment, environmental, fern, forest, fresh, glass, global, globe, grass, green, help, industrial, leaves, life, light, map, money, moss, nature, planet, plant, protect, protection, recycle, recycling, safe, save, sphere, sunlight, sustainability, sustainable, transparent, tree, world,