Are cars really necessary?

Korean think that car is very important in whole life.Even though Korean think that buy the car is more important than buy the house. Actually, many korean act that way. So If not too poor, most of household has a car. But I don't necessary a car. Everyday I use a transit system when I go to school, specially a suvway. I think that univercity student don't necessary a car specially.
Nowadays, transit system is very developed and useful. If many people use a transit system good way, they are don't necessary a personal car. Also, some people have a luxury car for just show other people. Like this behavior provoke bad social view. Also, The cost of one car is never cheep for most of people. We must save a property. In addition, we need to think about our enviroment.
My opinion is not mean absolutely stop use a car. We need to reduse a time of use a car. Transit system is more economy than use a car. We need to use a car only for important metter. At first, if you complain about don't use a car, but as long as you tumble to don't use a car, it's OK. The important thing is people's mind. Depend on mental attitude, it is nothing for you that don't use a car.