text: The decrease in fumes from cars is very beneficial to the environment. People and organizations are making drastic efforts to reduce greenhouse gas emissions from tailpipes. According to paragraph five of "In German Suburb, Life Goes On Without Cars," twelve percent of greehouse gas in Europe is caused by passenger cars and fifty percent in some areas of the United States. The Environmental Protection Agency is promoting "car reduced" communities because emissions from cars contributes to half of the pollution in America. In the Article by Robert Duffer, "Paris Bans Driving Due to Smog" he describes the event that Paris had to declare a ban on half of the drivers because the  large amount of smog that lingered over Paris. Colombia even has a day dedicated to being free of cars to reduce smog and promote alternative transportation. All of these events show the severity of environmental problems caused by cars and people making efforts to promote a better environment.