text: Now, you've probably had this fact jammed down your throat more times than you care to count, but, cars produce a lot of gas, which isn't really easy on the environment.  According to the New York Times article, "In German Suburb, Life Goes On Without Cars" by Elisabeth Rosenthal, "Passenger 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." And according to the Chicago Tribune article, "Paris bans driving due to smog" by Robert Duffer, "Last week Paris had 147 micrograms of particulate matter (PM) per cubic meter." So, less car usage means less greenhouse emissions. Yes, there are cars out there that are more "fuel-efficient," but they still require lots of energy from the environment. Not only that, but using your car less often will mean that you won't have to deal with one of the biggest evils in the world.........traffic.