Ключевые слова: america, background, bio, biology, care, clean, concept, conservation, continent, day, development, earth, eco, ecology, ecosystem, energy, environment, environmental, forest, fresh, glass, global, globe, grass, green, growth, hand, holding, landscape, leaf, life, map, moss, nature, organic, planet, plant, protect, recycle, reusing, safety, save, space, sphere, sunlight, sustainable, transparent, tree, vitality, world,