Nowadays, there are more problem that the society have to solve. Some of them are very dangerous. Today I would like to tell with you about the overcrowding in some country in the world. Overcrowding is condition that too many people living in a area. Nowadays, the boom population of the world are very serious. This leads to some people have to live in slums, where the medical condition is very bad and the criminal rate is higher than other places. Moreover, homelessness is become more popular in some bigcity because there are too many people, so the price of house is higher and some people cannot afford it. They have to live outside the roads, where their health is badly effects. In addition, this also leads to child labour. The family which have too many children cannot earn enough money for the family without some child have to go out and work. They cannot go to school and cannot develop both physical and mental.