text: Like it says in source 1 "Passenger cars are responsible for 12 percent of greenhouse gas emissions in Europe . . . and up to 50 percent in some car-intense areas in the United States." Cars release gases into the air which cause pollution. The pollution is bad for the enviroment and for civilians health. Like this one time in Paris the pollution form cars got so bad it created a smog over the city. After days of near-record pollution, Paris enforced driving ban to clear the area of the global city. Citezens of Paris were fined if they were seen driving during the ban, only some cars were abke to be driving on specific days. Just after a few days of this ban the smog cleared enough for a vehicles were able allowed to drive.  To reduce this we must do what a few cities around the world do. Some small cities around the world are reducing car usage by creating more accesible public transportation methods, with less parking space. Also the stores are placed on a walk way, on a main street rather than in malls which are far away.