text: Another example is Paris in 2014. Due to the abundance of smog in the air, Paris banned driving cars for a limited amount of time. This fixed their problem, but Paris removed the ban after only one week. Source 2 states, "The smog cleared enough Monday for the ruling French party to rescind the ban for odd-numbered plates on Tuesday." Why would France stop the solution to their smog problem. The answer is, loss of revenue. Many companies during this ban lost revenue due to not being able to deliver their goods. Source 2 also states, "Diesel fuel was blamed, since france has ... [a] tax policy that favors diesel over gasoline. Diesels make up 67 percent of vehicles in France, compared to 53.3 percent average of diesel engines in the rest of Western Europe." This is a key factor in France's smog problem, and could be stopped by making a law limiting car usage.