求英语作文,主题：有关汽车的.第一段为汽车在当今时代越来越多了.第二段为汽车的好处,第三段为汽车的坏处.

Cars,a necessary transportation tool,are becoming more and more significant in our modern society.
Using a car is faster than taking a bus especially when time is limited.It does not have to stop as frequently as a bus,and at the same time,it is much easier to keep to a tight schedule.As far as I am concerned,cars have a greater beneficial effect on the society.A car will certainly get you where you are going faster,and in doing so it will reduce the pressure on you and your work schedule.For example,a man would spend one hour on the way to work by car,whereas it will reduce the pressure on you and your work schedule.For example,a man would spend one hour on the way to work by car,whereas it will take more than 2 hours if he chooses to take bus.Calculate,just how many assignments could be finished during that one hour?
On the other hand,we cannot ignore the problems which are induced by driving a car,such as energy crisis,traffic problems,even the environmental pollutions.With the increasing numbers of cars,big cities are faced with a serious problem,traffic jams.No doubt cars consume a large quantity of energy,gasoline and electricity,both of which cause air and water pollution.If we continue wasting these energies,it is hard to imagine life in twenty years time.Increasing animal extinction,food shortages,and health worse than before.How could we live in such a society?