The population explosion is taking place in all the world. And, most of the big cities are overpopulated. most of the questions have been giving a problem. For example, why do people still move to big cities? or what do you go to the city ? and more and have a lot of the reasons have been giving explanation. However, i thing two reasons is big about:
The first, the city where have favorable, it have a flat road, weather is very good, or a school, a hospital, a bank, a park and more, everything is very favorable. So, it's one in two reasons. Nowaday, the poeple have the trend enjoys life because the their life is becoming full, they aren't focus a lot of make money, so they care for health and spirit more than. For example, a people sicks, you needs hospital but that contryside don't hospital, so you go to city where have hospital, but when you going to hospital, you sicks seriously.
The second, the most important reason is the problem of job. It's problem of a person that is problem of the world. In the city, the people can look for good job or the job accordants with degree. And, salary in the city higher than salary in the countryside. For example, a peole lived countryside, each of month you could look for one million vietnam dong, but you went to the city, you can look for three million vienam dong.
We can see, that example proves about why most of the big cities are overpopulated

By deciding which city is the best fit for you and your family, you can help reduce the stress of city life and enjoy the advantages that come with urban living.One of the major advantages of living in the city is having a lot of convenience, for example supermarkets, schools, ... easy to find. The disadvantages include experiencing higher levels of stress due to traffic conditions or difficulty in getting help from the authorities or public institutions during normal working hours. The advantages and disadvantages of living in the city are very dramatic. Many people want some benefits and services that can be seen in the cities, but the basic services that provide in a city are not able to meet everyone's needs. 

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