The expense of buying and running a car can be raised. If the motorist is faced with a high purchase price, high road tax, high insurance premiums and substantial fines he or she may reconsider the purchase. A corresponding reduction in the price of public transport would help this financial argument against car ownership.
Neither of these arguments will sway the super rich who can afford the status cars, but it would perhaps encourage them to look at other ways of demonstrating their wealth. However we do it, reducing the number of cars on the road will reduce the problems of pollution and the congestion which can bring cities to a standstill. - Conclusions: states the benefits of reducing the number of cars
Remember: this sample answer is one of several satisfactory ways to answer the question. Other essays which respond to the writing task would also be acceptable.
Source: Prepare for IELTS, by Vanessa Todd & Penny Cameron, 1996, UTS, Australia. For non-profit educational use only.