Owing to the necessity of addressing urban demands, there is no doubt that traffic and pollution are critical issues affecting public well-being. It is a commonly held belief that encouraging people to move from suburban or rural areas into city centres can contribute to solving these problems. However, there is also an opposing argument that increasing the number of residents in central areas may lead to additional risks. In my opinion, I believe that increasing population density in city centres is likely to result in negative consequences, such as the spread of illnesses and worsened traffic conditions.