With the development of economy ,our life is becoming better and better.Personal cars are accepted by people gradually.It brings us convenient and entertainment,while those still has many negative effects. The reason why many families choose to by a car is that it could save time and make life more convenient .You need not catch a bus or ride a bicycle.Many factors influence this determination,such as the far workplace or having parents living far away. I do not really agree with them because I think personal cars have more disadvantages than advantages.As the cars make too much noise and with the increasing number of personal cars ,the city is more crowded than before .What affects us the most is that the traffic accidents happened more frequently because the drivers bad driving skills. Now we advocate the low carbon life and everyone should contribute to it in order to make a harmonious society.