Living in an overcrowded city has many horrible drawbacks. Firstly, the city dwellers have to suffer from traffic problems such as traffic congestion, accidents,... every day. As the population is growing rapidly, there is a considerable increase in the number of vehicles. Therefore, traffic can be a nightmare in the big city. Secondly, the pollution in an overcrowded city is extremely serious. For instance, the waste from factories, vehicles cause air pollution; the noise from traffic, construction site cause noise pollution, the domestic waste cause water pollution,..... As a result, the city's residents have to put up with noise pollution, visual pollution, air pollution, water pollution,.... for a long time, which has a negative influence on their health. Last but not least, The crime rate in an overcrowded city is usually high. Since there is always more crime in a big city, you are much more likely to be a victim of a crime living in a big city. In conclusion, these factors contribute to making the overcrowded city's life difficult for its residents.