text: First off, reducing smog in your area. smog is generated out of the tail pipes of motor vehicles and is bad for the enviroment and atmosphere. with limiting your daily car commute you can remove a good part from your area. when Paris had ordered that only plates that only odd number plates could drive on the roads on monday their large smog cloud of 147 micrograms of PM per cubic meter smog was greatly reduce and lifted the following day. so just one day of cutting the daily car commute in half a city as big as Paris was able to lift a smog.