text: Removing some of our outrageous motor vehicle usage is also good for the enviorment.  As mentioned in Source 2, Smog that was already prevalent in places like Beijing, China has found it's way into modern European cities like Paris, with more to follow if we do't cut back, and soon. Paris has known to have over 147 Micrograms of pariculate matter per cubic meter, with other cities like Brussels and London having 114 and 79.7 respectively. If that didn't seem bad enough, it's worse in other areas. In some areas of the United States, passenger cars are responsible for up to 50% of greenhouse gas emissions.