Ключевые слова: abstract, background, ball, black, blue, board, business, care, careful, circle, closeup, communication, concept, conceptual, continent, crisis, earth, eco, ecology, environment, environmental, game, geography, global, globe, green, hit, idea, land, life, luck, map, metaphor, natural, nature, north, numbers, planet, protect, recycle, recycling, score, shape, sphere, success, symbol, target, white, win, world,