Positive and negative effects of people owning cars?

Positive and negative effects of people owning cars?
It is very usefull to have cars. Reasons: They are fast and you canget to places quickliy when you have them. This can be extremelyusefull when you are in a hurry. Or if you need to get to a placevery far away you can take your car and it will get you there muchfaster than a train, buss or whatever. Also a car is very big so ifyour friends need a lift home you can drive them there.