Ключевые слова: america, background, body, boy, care, chance, communication, concept, conceptual, copy, cultural, danger, disaster, earth, environment, environmentalism, geography, global, globe, hands, holidays, human, ideas, life, map, nature, ocean, ozone, part, peace, peaceful, people, planet, pollution, problem, protected, protection, recycling, responsibilty, save, sea, sky, small, space, terra, travel, tropical, usa, world, young,