text: Reasons why limiting car usage has been discussed throughout many people and regions. 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. There has been efforts in the past two decades to make cities more suitable for walking but it's basic percepts are being adopted around the world in attempts to make suburbs more compact and more accessible to public transportation. From the passage, David Goldberg, an official of Transportation for America, says, "All of our development since Wold War Two has been centered on the car, and that will have to change." Mr. Goldberg describes how everything pertaining to where places are built, how many roads built, and not enough sidewalks is because of the car being the center of everything, that people are not focusing on anything else.