Ключевые слова: abstract, america, american, awareness, background, banner, blue, care, charity, child, community, concept, continent, crowd, day, earth, ecology, environment, environmental, family, future, global, globe, green, group, growth, hand, happy, harmony, help, holding, hope, human, humanity, international, life, man, map, nature, peace, person, planet, population, poster, protection, support, symbol, together, world, worldwide,