In twenty years there will be fewer cars in use than there are today. In my opinion, I agree with the statement which in twenty years there will be fewer cars in use than there are today. First of all, following the public transportation system’s complete, it will instead of personal car someday. for instance, now people don’t want to take the bus or subway to go somewhere, there are two reason. The first reason is, these vehicle always crowd at morning peak and night peak, it makes people feel awful. The Second reason is that traffic line can not cover some place or need transfer another vehicle, It is not convenient to people. Therefore, if we solve this two question, the car’s quantity will fewer than today. Secondly, the car’s exhaust can result in air pollution. Nowadays, Many government’s start setting a limit on car that people can buy to control car’s quantity. Meanwhile, many industries about transportation are arising quickly, like sharing cars, in the future, the People will not need to buy their own car, instead of many people use one car by sharing cars, It can also reduce car’s quantity . By this two point, I think that in twenty years there will be fewer cars in use than there are today.