which is in the Himalayas, is on the borders of Nepal and Tibet.It is 8,846 meters high and, as it is the tallest mountain, (36) everyone in the world has (37) heard of it.It is not the most difficult mountain to climb, but it is the one most climbers dream (38) of doing.In May 1953, the first climbers (39) reached the top.(40) Since then, more than 2,500 people have done the same.The first woman climbed to the top in 1975.More and more people (41) are likely to climb the mountain in the future as equipment improves.The (42) number of climbers is beginning to cause problems, however, (43) because many of them leave rubbish behind as they go up the mountain.(44) Some local people have climbed the mountain in order to (45) clean up the rubbish along the main climbing routes.