In our daily life,car has played a important role.To tell the truth,it brings us a lot convenient in our life.For example ,if we want to go to a place by car,it may help us save a lot of time .So,it is really very convenient at some times.
But,cars can bring us pollution ,too.As we all know,cars have bad effect on air.They make the air polluted.So we should not forget our environment when we use cars.And only in this way ,we will have a bright tomorrow!