text: Being safe is important and following the rules is also important too. That's why people should take thing like this serious and tell their children to put on a seat belt and also don't text and drive eat the same time. You never know what might happened to you and you may face some consequence.   Cars are the main cause of pollution in major cities. Cities are covered in smog from gas emmisions from a car's exhaust. This is not good for the environment. Something must be done about this. If the usage of cars is cut down, then the amout of pollution in the air will be less. A less usage of cars allows people to have a clean community and helps the environment.