In general, there are two ways of traveling, private cars and public transportation. Chinese people should regard public transportation as their first traveling opinion.
First, there are so many people living in this countries that make it so crowded. If each chinese people own a car, there will be far more traffic jams and accidents, which increase you impatience.
Moreover, there will be far more pollution resulted from cars. Once a car started, it release huge amount of dirty gas and heat, which lead to great pollution and result in green house effect.
All in all, Chinese people should take public transpotation into consideration first。
City traffic is a big problem in some cities in the world, especially in big cities. To solve the problem, someone are in favor of developing buses as means of city traffic. Others are in favor of the subway. Between them,which is the better choice?
It is easier to take buses as means of city traffic than the subway trains because buses don't need special roads. But buses have also many disadvantages, some of which are very serious. They may cause louder noise and more traffic accidents. Buses give rise to serious air pollution and traffic jam. In order to stop what buses cause, a large amount of hand must be used to widen the roads. On the contrary, the subway train is of more advantages. Except the difficulty and high cost of building the subway, it is superior to the buses in many aspects.
Taking the advantages and disadvantages together into consideration，I would be in favor of developing the subway train as soon as possible.
A kind of little car may someday take the place of today's big ones. If people drive such cars in the future, there will be less pollution in the air. There will be more space for parking in cities. The streets will be less crowded. And driving will be safer as these little cars can go only 65 km per hour. The future cars will be fine for getting round a city, but they will not be useful for long trips. Little cars will go 200km, before needing to stop for more gas. If big cars are still used along with the small ones, two sets of roads will be needed in the future. Some roads will be used for the big fast cars and other roads will be needed for the slow and small ones. It's said that three such little cars fit in the space now needed for one car the usual size.