text: To limit car usage has huge benefits; we can lessen the gasses that are polluted, lessening smog. It may not sound like something that effects your everyday life, but it does. Smog and air pollution are a problem, and a threat to our safety and well being. As of right now it is'nt a life or death situation, but if car usage continues to be a huge part of the world, all the air pollution from all the years of driving are going to get so bad people, and the earths atmosphere will be extremly affected by it. Think about your kids future, would you really want them to live in a world consumed by air pollution, and emission gasses, and smog.. To give an example, "passneger cars are responsible for 12 percent of greenhouse gas emissions in europe.. and up to 50 percent in some car intensive areas in the united states" (rosenthal). That just showing how much car usage affects air pollution and the air we breath everyday. Just decreasing the amount of car usage can reduce the smog, and air pollution in cities and towns.