text: Cars produce pollution that endangers our ecosystem. Countries are taking action in order to save the greenhouses. Paris had enforced a partial driving ban to clear the air of the global city. According to Robert Duffer, author of "Paris bans driving due to smog" he stated in paragraph 14 "Congestion was down 60 percent in the capital of France, after five-days of intensifying smog." Duffer also mentioned that Diesel fuel is responsible for this.