With the development of the Chinese economy,more and more families own their private cars.The private cars has made our lives much more convenient than before.Every coin has two sides.The pricate cars bring convenience and issues at the same time.The traffic jam,frequent accidents and air pollution have become the main problems.To solve these problems,our goverment should develop more of the public transportations,like bus,train,metro and so on.However,for the citizens,we'd not drive the private cars below 2 people.What's more,by bus,bike or on foot are always better ways to prtect the earth. With the development of the Chinese economy,more and more families own their private cars.The private cars has made our lives much more convenient than before.Every coin has two sides.The pricate cars bring convenience and issues at the same time.The traffic jam,frequent accidents and air pollution have become the main problems.To solve these problems,our goverment should develop more of the public transportations,like bus,train,metro and so on.However,for the citizens,we'd not drive the private cars below 2 people.What's more,by bus,bike or on foot are always better ways to prtect the earth.