Nothing can be good without having a side effect,this being the case with the car that although is good for transportation,it causes pollution in the enviroment.
Without cars it would be harder for us to move around and it would be bad for business also.
The best thing to do now is to find other fuels for cars that are not damaging the enviroment and because the oil resources won't be available in a short period of time since is used too much.