text: There is no doubt that cutting down on driving will greatly reduce the emission of grennhouse gases. As detailed in "Paris bans driving due to smog" by Robert Duffer, the effect of just one day of reduced driving played a signifigant impact on the amount of smog in Paris, France. The smog which covered the city of Paris rivaled that of Beijing, China, one of the most polluted cities in the world. The cause of the intense fog is thought to be diesel fuel, which is the most commonly used type of automobile fuel in France. Because of this, Paris has a very high smog concentration compared to other Western European capitals. The temporary ban on driving drastically improved the conditions in Paris, and the ban was lifted after only one day. If this idea of reducing the use of automobiles spreaded to other car-dependent countries such as the U.S., there is no telling how much the impact of society on the emission of greenhouse gasses will reduce.