text: I'm just trying to incourage people to limit their car usage. Like in Bogota and Paris, having so little traffic. It reduces the smog in the air. Having better sidewalks for people who doesn't have a car can walk on with out tripping. If it's impossible to have an international car-free day, let's have a major city car-free day or atleast incourage everybody to limit car usage would really help this world!    Having to do school work over the summer? Summer assignments is a great way for students to not forget everything they learned over the school year. If a student goes from June to September without reviewing their course material from the previous years, they are bound to forgetting lots of important information. Students have very creative minds and should be able to come up with their own way of studying or going over past information. Teacher designed assignments can force students to do unnecessary research which can waste a lot of time. Summer projects should be student designed because it allows each student to put their time in to something that interests them, teachers can learn more about their future students, and teacher designed projects sometimes dis encourage students to complete them.