Ключевые слова: america, backdrop, ball, business, care, conceptual, continent, day, earth, eco, ecology, environment, environmental, family, finger, fingers, future, global, globe, green, hand, hands, help, holding, hope, keep, life, man, map, nature, network, palm, peace, people, planet, pollution, protect, protection, recycle, safety, save, science, sign, space, sphere, symbol, technology, warming, world, worldwide,