text: Limiting car usage helps decrease any sort of problem with smog or greenhouse gas emission. As stated in Source 2, "Paris enforced a partial driving ban to clear the air of the global city"(10). Since Paris decided to enforce the ban, the smog had cleared enough Monday for the French party to rescind the ban on Tuesday. Thus proving the point that limiting car usage either through a ban or just a vehicle-free zone, as in Germany, it can reduce smog and/or greenhouse gas emission. Greenhouse gas emission can be reduced simply by either switching to a more economy efficient car such as the hybrid or creating a low-car surburban society. As stated in Source 1, "Passenger cars are resposible for 12 percent of greenhouse gas emissions in Europe... and up to 50 percent in some car-intensive areas in the United States."(5).Businessman Carlos Arturo Plaza asserted that "It's a good opportunity to take away stress and lower air pollution"(Source 3,24) demonstrating that more than one person agree that lowering the use of cars is good for any society.