text: The limitation of car usage betters the environment. Cars emit greenhouse gases in the atmosphere faster than they can be removed. This causes health problems in living organisms and pollution of ecosystems. Cars are liable for 12 percent of greenhouse gas emissions in Europe and 50 percent in areas in the U.S. as Source 1 states. People are playing with the balance of nature and if its not fixed then humans are as good as dead; this is why the implementation of limiting car usage benefits people. The effects of this can be seen in Bogota, Colombia, whose goal is to reduce smog and promote alternative transporation (Source 3), and Paris, where intense smog covered the enitre city: "The smog rivaled Beijing, China, which is known as one of the most polluted cities in the world.(Source 2)" The source explains that cold nights and warm days trapped in car emissions and after a few days of reducing car usage the air cleared up. This shows the effectiveness of the limiations of car usage.