text: To begin, a benifit of limiting our car usage is fuel pollutes the air by circulating green house gasses that can cause a dangerous enviroment to form and by limiting cars we limit this pollution. With President Obama's issue to decrease the amount of air pollution caused by cars, many have realized that car usage is not as common as it used to be. If the number of cars on the road continues to deplete- "and many sociologists believe it will-it will have benificial implications for carbon emissions and the enviroment, since transportation is the second largest source of America's emissions, just behind power plants" (Rosenthal source 4) says Rosenthal in her article "The End of Car Culture." By keeping track and trying to deplete the time you spend driving your car the trend of putting air pollution to an end will increase.