text: Transportation is the second largest source of America's emmisions and is responsible for fifty percent of greenhouse gas emissions in the United States but is slowly making a change towards helping the enviornment and being beneficial towards carbon emissions. In 2005, the number of miles driven in the United States was at it's highest rate. As time went by, the numbers started dropping and getting lower. Many sociologits believe that if the numbers get even lower and stay at that rate, the benefits will come for the enviornment but unfortunetly not for car companys. Paris typically has more smog than any other European capital and is working towards a way to fix that. Paris banned driving due to the intensity and abundance of the smog in their city and had people use public transportation free of charge for about a week. Not using motor vehicles for those days really did help the situation of Paris and gave people an insight as to how life would be without cars.