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           Slums are all over the world and are growing. A slum is a densely populated urban area which is characterized by a generally low standard of living. Slums may also be known as shantytowns, barrios, ghettos, or favelas, although some of these terms have specific cultural meanings. Slums are a world epidemic because they are extremely over-crowded, leading to poor health care and high crime rates. Slums are very populated because thats is were poor people can afford to live.