As is described in the picture, an increasing number of private cars are running in big cities. It is certain that private cars have brought us a lot of convenience and e0mfort. But meanwhile, they have brought more traffic jams too. The situation is sometimes so seri01is that people have to queue for miles in streets waiting and wasting their time on the way. And serious pollution is another problem caused by the many vehicles. Therefore, the government has to limit the number of cars running in the streets.
In my opinion, public transportation services such as buses, taxis and subways should be encouraged in order to settle the problem. And people's awareness to protect our environment also needs to be promoted. If possible, they are encouraged to take public transportation, or even ride bikes or walk, which will not only save energy but also benefit their health."

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