text: Automobiles are one of the biggest ailments to the sustainment of a healthy environment. In "In German Suburb, Life Goes On Without Cars", author Elisabeth Rosenthal shares the story of Vauban, Germany and their efforts to reduce greenhouse gases in the atmosphere. "Passenger cars are responsible for 12 percent of greenhouse gas emmisions in Europe...and up to 50 percent in some car-intensive areas in the United States." The impact of these gas emmsions is incredibly negative on cities. They make the environment unstable and unsafe for a large number of people. These numbers could easily be reduced if fewer people chose to rely on cars as their mode of transportation. In some places the pollution caused by automobiles is so high that the government is stepping in to assist in the management of city spaces. In "Paris bans driving due to smog", author Robert Duffer explains this specific situation in Paris, France. "After days of near-record pollution, Paris enforced a partial driving ban to clear the air of the global city. On Monday motorists with even-numbered license plates were ordered to leave their cars at home or suffer a 22-euro fine ($31). The same would apply to odd-numbered plates the following day." The effects of this temporary ban were also shared. "Congestion was down 60% in the capital of France, after five-days of intesifying smog." It is easy to see that just a small reduction of vehicles created a significant change.