text: The reasons people should cut down on car usage is to lower pollution in the air. It just makes people happier without vehicles. Towns could be made with closer buildings to prevent using too much gas. Smog can really make an environment unhealthy by killing some of the plants that are there.    Some schools require summer projects for students. Just to assure students are to continue learning through out their summer break. Many argue if the summer projects should be teacher-designed or student-designed. The schools that require summer projects should have their projects be teacher-designed for many various reasons.