1. People who live in large cities have to face a lot of problems in daily life.

2. Firstly, housing shortage is becoming more and more serous in big cities. Many people cannot afford to buy their own houses so they have to rent and live in small rooms.

3. Furthermore, noise from traffic and construction sites have a bad impact on citixens' health. More and more people are getting hearing problems and suffering from insomnia.

4. Lastly, crime is always the most complicated problem and it is more severe in the city. The increase in population and fiancial problem has lead to numerous criminal activities such as burglary, robery and violence.