答案：
One possible version:
With the improvement of people's living conditions, owning private cars is becoming popular in China.
Different voices arise in a recent survey conducted by us.
Those in favour of buying private cars argue that waiting for buses wastes much time. Even when they
manage to get onto the bus, crowdedness often makes them uncomfortable. Private cars make up for the
above headaches, though. Besides, owning cars indicates the advancement of our country, and it also
stimulates auto industry and therefore contributes to economic development. However, other people list
some unfavorable effects of private cars. They often create traffic jams; they consume plenty of oil. What's
more, they give off enormous waste gases, causing pollution and disease.
In our view, to develop clean and hybrid fuels may be a good solution to air pollution, because it can
reduce the emission (排放) of carbon dioxide. In addition, efficient and convenient public transportation
systems can also discourage people from buying private cars. On the whole, awareness of environment
protection needs the collective efforts from the government as well as the public.